102002022120021 has 4 divisors (see below), whose sum is σ = 136002696160032. Its totient is φ = 68001348080012.

The previous prime is 102002022120001. The next prime is 102002022120043. The reversal of 102002022120021 is 120021220200201.

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 102002022120021 - 2¹⁷ = 102002021988949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002022120001) 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, 17000337020001 + ... + 17000337020006.

It is an arithmetic number, because the mean of its divisors is an integer number (34000674040008).

Almost surely, 2^{102002022120021} is an apocalyptic number.

It is an amenable number.

102002022120021 is a deficient number, since it is larger than the sum of its proper divisors (34000674040011).

102002022120021 is an equidigital number, since it uses as much as digits as its factorization.

102002022120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34000674040010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 102002022120021 its reverse (120021220200201), we get a palindrome (222023242320222).

The spelling of 102002022120021 in words is "one hundred two trillion, two billion, twenty-two million, one hundred twenty thousand, twenty-one".