102010223021 has 4 divisors (see below), whose sum is σ = 116583112032. Its totient is φ = 87437334012.

The previous prime is 102010223011. The next prime is 102010223059. The reversal of 102010223021 is 120322010201.

It is a happy number.

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: 120322010201 = 19 ⋅6332737379.

It is a de Polignac number, because none of the positive numbers 2^k-102010223021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102010222987 and 102010223005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102010223011) 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, 7286444495 + ... + 7286444508.

It is an arithmetic number, because the mean of its divisors is an integer number (29145778008).

Almost surely, 2^102010223021 is an apocalyptic number.

It is an amenable number.

102010223021 is a deficient number, since it is larger than the sum of its proper divisors (14572889011).

102010223021 is an equidigital number, since it uses as much as digits as its factorization.

102010223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14572889010.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 102010223021 its reverse (120322010201), we get a palindrome (222332233222).

The spelling of 102010223021 in words is "one hundred two billion, ten million, two hundred twenty-three thousand, twenty-one".