102021232121 has 4 divisors (see below), whose sum is σ = 102230721792. Its totient is φ = 101811742452.

The previous prime is 102021232087. The next prime is 102021232129. The reversal of 102021232121 is 121232120201.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121232120201 = 661 ⋅183407141.

It is a cyclic number.

It is not a de Polignac number, because 102021232121 - 2³⁰ = 100947490297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102021232121.

It is not an unprimeable number, because it can be changed into a prime (102021232129) 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, 104744105 + ... + 104745078.

It is an arithmetic number, because the mean of its divisors is an integer number (25557680448).

Almost surely, 2^102021232121 is an apocalyptic number.

It is an amenable number.

102021232121 is a deficient number, since it is larger than the sum of its proper divisors (209489671).

102021232121 is an equidigital number, since it uses as much as digits as its factorization.

102021232121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209489670.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 102021232121 its reverse (121232120201), we get a palindrome (223253352322).

The spelling of 102021232121 in words is "one hundred two billion, twenty-one million, two hundred thirty-two thousand, one hundred twenty-one".