1212111201101 has 16 divisors (see below), whose sum is σ = 1266451061760. Its totient is φ = 1158609883200.

The previous prime is 1212111201097. The next prime is 1212111201107. The reversal of 1212111201101 is 1011021112121.

It is a cyclic number.

It is not a de Polignac number, because 1212111201101 - 2² = 1212111201097 is a prime.

It is a super-2 number, since 2×1212111201101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212111201107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47035646 + ... + 47061408.

It is an arithmetic number, because the mean of its divisors is an integer number (79153191360).

Almost surely, 2^{1212111201101} is an apocalyptic number.

It is an amenable number.

1212111201101 is a deficient number, since it is larger than the sum of its proper divisors (54339860659).

1212111201101 is a wasteful number, since it uses less digits than its factorization.

1212111201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41956.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1212111201101 its reverse (1011021112121), we get a palindrome (2223132313222).

The spelling of 1212111201101 in words is "one trillion, two hundred twelve billion, one hundred eleven million, two hundred one thousand, one hundred one".