102021222101021 has 4 divisors (see below), whose sum is σ = 102632127622752. Its totient is φ = 101410316579292.

The previous prime is 102021222100949. The next prime is 102021222101047. The reversal of 102021222101021 is 120101222120201.

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 a de Polignac number, because none of the positive numbers 2^k-102021222101021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021222101621) 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, 305452760615 + ... + 305452760948.

It is an arithmetic number, because the mean of its divisors is an integer number (25658031905688).

Almost surely, 2^{102021222101021} is an apocalyptic number.

It is an amenable number.

102021222101021 is a deficient number, since it is larger than the sum of its proper divisors (610905521731).

102021222101021 is an equidigital number, since it uses as much as digits as its factorization.

102021222101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610905521730.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102021222101021 its reverse (120101222120201), we get a palindrome (222122444221222).

The spelling of 102021222101021 in words is "one hundred two trillion, twenty-one billion, two hundred twenty-two million, one hundred one thousand, twenty-one".