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311212101212113 = 1253872482012499
BaseRepresentation
bin100011011000010111011011…
…0101111100001011111010001
31111210220120211102110012221011
41012300232312233201133101
5311242344340402241423
63021520510544530521
7122360221662345253
oct10660566657413721
91453816742405834
10311212101212113
1190186346940382
122aaa2ba7020a41
1310486237c58c7a
1456bca632d5cd3
1525ea51aa51b0d
hex11b0bb6be17d1

311212101212113 has 4 divisors (see below), whose sum is σ = 311214583350000. Its totient is φ = 311209619074228.

The previous prime is 311212101212101. The next prime is 311212101212149.

311212101212113 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 311212101212113 - 29 = 311212101211601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311212101212183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240880863 + ... + 1241131636.

It is an arithmetic number, because the mean of its divisors is an integer number (77803645837500).

Almost surely, 2311212101212113 is an apocalyptic number.

It is an amenable number.

311212101212113 is a deficient number, since it is larger than the sum of its proper divisors (2482137887).

311212101212113 is a wasteful number, since it uses less digits than its factorization.

311212101212113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482137886.

The product of its (nonzero) digits is 144, while the sum is 22.

It can be divided in two parts, 31121210 and 1212113, that added together give a palindrome (32333323).

The spelling of 311212101212113 in words is "three hundred eleven trillion, two hundred twelve billion, one hundred one million, two hundred twelve thousand, one hundred thirteen".

Divisors: 1 125387 2482012499 311212101212113