111020210122121 has 4 divisors (see below), whose sum is σ = 111027345571200. Its totient is φ = 111013074673044.

The previous prime is 111020210122093. The next prime is 111020210122141. The reversal of 111020210122121 is 121221012020111.

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 111020210122121 - 2³⁰ = 111019136380297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111020210122121.

It is not an unprimeable number, because it can be changed into a prime (111020210122141) 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, 3567701201 + ... + 3567732318.

It is an arithmetic number, because the mean of its divisors is an integer number (27756836392800).

Almost surely, 2^{111020210122121} is an apocalyptic number.

It is an amenable number.

111020210122121 is a deficient number, since it is larger than the sum of its proper divisors (7135449079).

111020210122121 is an equidigital number, since it uses as much as digits as its factorization.

111020210122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7135449078.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111020210122121 its reverse (121221012020111), we get a palindrome (232241222142232).

The spelling of 111020210122121 in words is "one hundred eleven trillion, twenty billion, two hundred ten million, one hundred twenty-two thousand, one hundred twenty-one".