102021202122121 has 4 divisors (see below), whose sum is σ = 103312609744000. Its totient is φ = 100729794500244.

The previous prime is 102021202122113. The next prime is 102021202122149. The reversal of 102021202122121 is 121221202120201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102021202122121 - 2³ = 102021202122113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102021202102121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645703810821 + ... + 645703810978.

It is an arithmetic number, because the mean of its divisors is an integer number (25828152436000).

Almost surely, 2^{102021202122121} is an apocalyptic number.

It is an amenable number.

102021202122121 is a deficient number, since it is larger than the sum of its proper divisors (1291407621879).

102021202122121 is an equidigital number, since it uses as much as digits as its factorization.

102021202122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291407621878.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 102021202122121 its reverse (121221202120201), we get a palindrome (223242404242322).

The spelling of 102021202122121 in words is "one hundred two trillion, twenty-one billion, two hundred two million, one hundred twenty-two thousand, one hundred twenty-one".