102112111211021 has 16 divisors (see below), whose sum is σ = 103612062809088. Its totient is φ = 100613889398400.

The previous prime is 102112111211017. The next prime is 102112111211027. The reversal of 102112111211021 is 120112111211201.

It is a cyclic number.

It is not a de Polignac number, because 102112111211021 - 2² = 102112111211017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102112111211027) 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, 1084970756 + ... + 1085064866.

It is an arithmetic number, because the mean of its divisors is an integer number (6475753925568).

Almost surely, 2^{102112111211021} is an apocalyptic number.

It is an amenable number.

102112111211021 is a deficient number, since it is larger than the sum of its proper divisors (1499951598067).

102112111211021 is an equidigital number, since it uses as much as digits as its factorization.

102112111211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103132.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 102112111211021 its reverse (120112111211201), we get a palindrome (222224222422222).

The spelling of 102112111211021 in words is "one hundred two trillion, one hundred twelve billion, one hundred eleven million, two hundred eleven thousand, twenty-one".