102100122210021 has 16 divisors (see below), whose sum is σ = 150567609193344. Its totient is φ = 61132713505344.

The previous prime is 102100122210007. The next prime is 102100122210043. The reversal of 102100122210021 is 120012221001201.

It is not a de Polignac number, because 102100122210021 - 2¹³ = 102100122201829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100122210061) 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, 35377726281 + ... + 35377729166.

It is an arithmetic number, because the mean of its divisors is an integer number (9410475574584).

Almost surely, 2^{102100122210021} is an apocalyptic number.

It is an amenable number.

102100122210021 is a deficient number, since it is larger than the sum of its proper divisors (48467486983323).

102100122210021 is a wasteful number, since it uses less digits than its factorization.

102100122210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70755455500.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102100122210021 its reverse (120012221001201), we get a palindrome (222112343211222).

The spelling of 102100122210021 in words is "one hundred two trillion, one hundred billion, one hundred twenty-two million, two hundred ten thousand, twenty-one".