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12002012111 = 31387161681
BaseRepresentation
bin10110010110110000…
…00010101111001111
31010222102220101110002
423023120002233033
5144040003341421
65302540434515
7603264263645
oct131330025717
933872811402
1012002012111
1150a9906381
1223ab548a3b
1311936ba61b
1481bdc3195
154a3a1bb0b
hex2cb602bcf

12002012111 has 4 divisors (see below), whose sum is σ = 12389173824. Its totient is φ = 11614850400.

The previous prime is 12002012107. The next prime is 12002012137. The reversal of 12002012111 is 11121020021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11121020021 = 29383483449.

It is a cyclic number.

It is not a de Polignac number, because 12002012111 - 22 = 12002012107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002012092 and 12002012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002012411) 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, 193580810 + ... + 193580871.

It is an arithmetic number, because the mean of its divisors is an integer number (3097293456).

Almost surely, 212002012111 is an apocalyptic number.

12002012111 is a deficient number, since it is larger than the sum of its proper divisors (387161713).

12002012111 is an equidigital number, since it uses as much as digits as its factorization.

12002012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387161712.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12002012111 its reverse (11121020021), we get a palindrome (23123032132).

The spelling of 12002012111 in words is "twelve billion, two million, twelve thousand, one hundred eleven".

Divisors: 1 31 387161681 12002012111