102111122220121 has 32 divisors (see below), whose sum is σ = 120928348569600. Its totient is φ = 84373234640640.

The previous prime is 102111122220101. The next prime is 102111122220187. The reversal of 102111122220121 is 121022221111201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102111122220121 - 2⁷ = 102111122219993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102111122220101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1135040140 + ... + 1135130098.

It is an arithmetic number, because the mean of its divisors is an integer number (3779010892800).

Almost surely, 2^{102111122220121} is an apocalyptic number.

It is an amenable number.

102111122220121 is a deficient number, since it is larger than the sum of its proper divisors (18817226349479).

102111122220121 is a wasteful number, since it uses less digits than its factorization.

102111122220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110149.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 102111122220121 its reverse (121022221111201), we get a palindrome (223133343331322).

The spelling of 102111122220121 in words is "one hundred two trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twenty thousand, one hundred twenty-one".