111212010100121 has 16 divisors (see below), whose sum is σ = 128997012664704. Its totient is φ = 93901413158784.

The previous prime is 111212010100111. The next prime is 111212010100141. The reversal of 111212010100121 is 121001010212111.

It is not a de Polignac number, because 111212010100121 - 2³⁰ = 111210936358297 is a prime.

It is a super-2 number, since 2×111212010100121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111212010100096 and 111212010100105.

It is not an unprimeable number, because it can be changed into a prime (111212010100111) 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, 157801301 + ... + 158504493.

It is an arithmetic number, because the mean of its divisors is an integer number (8062313291544).

Almost surely, 2^{111212010100121} is an apocalyptic number.

It is an amenable number.

111212010100121 is a deficient number, since it is larger than the sum of its proper divisors (17785002564583).

111212010100121 is an equidigital number, since it uses as much as digits as its factorization.

111212010100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040480.

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

Adding to 111212010100121 its reverse (121001010212111), we get a palindrome (232213020312232).

The spelling of 111212010100121 in words is "one hundred eleven trillion, two hundred twelve billion, ten million, one hundred thousand, one hundred twenty-one".