121010112111021 has 16 divisors (see below), whose sum is σ = 184403422003200. Its totient is φ = 69145987732848.

The previous prime is 121010112111013. The next prime is 121010112111059. The reversal of 121010112111021 is 120111211010121.

It is not a de Polignac number, because 121010112111021 - 2³ = 121010112111013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010112111061) 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, 109761741 + ... + 110858738.

It is an arithmetic number, because the mean of its divisors is an integer number (11525213875200).

Almost surely, 2^{121010112111021} is an apocalyptic number.

It is an amenable number.

121010112111021 is a deficient number, since it is larger than the sum of its proper divisors (63393309892179).

121010112111021 is a wasteful number, since it uses less digits than its factorization.

121010112111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220646608.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121010112111021 its reverse (120111211010121), we get a palindrome (241121323121142).

The spelling of 121010112111021 in words is "one hundred twenty-one trillion, ten billion, one hundred twelve million, one hundred eleven thousand, twenty-one".