102121011200121 has 64 divisors (see below), whose sum is σ = 143168537207808. Its totient is φ = 64671781459968.

The previous prime is 102121011200107. The next prime is 102121011200123. The reversal of 102121011200121 is 121002110121201.

It is a happy number.

It is not a de Polignac number, because 102121011200121 - 2⁶ = 102121011200057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102121011200121.

It is not an unprimeable number, because it can be changed into a prime (102121011200123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3546716101 + ... + 3546744893.

It is an arithmetic number, because the mean of its divisors is an integer number (2237008393872).

Almost surely, 2^{102121011200121} is an apocalyptic number.

It is an amenable number.

102121011200121 is a deficient number, since it is larger than the sum of its proper divisors (41047526007687).

102121011200121 is a wasteful number, since it uses less digits than its factorization.

102121011200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30530.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 102121011200121 its reverse (121002110121201), we get a palindrome (223123121321322).

The spelling of 102121011200121 in words is "one hundred two trillion, one hundred twenty-one billion, eleven million, two hundred thousand, one hundred twenty-one".