102100111210121 has 16 divisors (see below), whose sum is σ = 110744127910080. Its totient is φ = 93749278917120.

The previous prime is 102100111210109. The next prime is 102100111210127. The reversal of 102100111210121 is 121012111001201.

It is a cyclic number.

It is not a de Polignac number, because 102100111210121 - 2²⁶ = 102100044101257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102100111210096 and 102100111210105.

It is not an unprimeable number, because it can be changed into a prime (102100111210127) 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, 57010310 + ... + 58773936.

It is an arithmetic number, because the mean of its divisors is an integer number (6921507994380).

Almost surely, 2^{102100111210121} is an apocalyptic number.

It is an amenable number.

102100111210121 is a deficient number, since it is larger than the sum of its proper divisors (8644016699959).

102100111210121 is a wasteful number, since it uses less digits than its factorization.

102100111210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846744.

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

Adding to 102100111210121 its reverse (121012111001201), we get a palindrome (223112222211322).

The spelling of 102100111210121 in words is "one hundred two trillion, one hundred billion, one hundred eleven million, two hundred ten thousand, one hundred twenty-one".