102512663021 has 4 divisors (see below), whose sum is σ = 103319849472. Its totient is φ = 101705476572.

The previous prime is 102512663003. The next prime is 102512663041. The reversal of 102512663021 is 120366215201.

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 102512663021 - 2¹⁴ = 102512646637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102512663041) 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, 403593035 + ... + 403593288.

It is an arithmetic number, because the mean of its divisors is an integer number (25829962368).

Almost surely, 2^102512663021 is an apocalyptic number.

It is an amenable number.

102512663021 is a deficient number, since it is larger than the sum of its proper divisors (807186451).

102512663021 is an equidigital number, since it uses as much as digits as its factorization.

102512663021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807186450.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 102512663021 its reverse (120366215201), we get a palindrome (222878878222).

The spelling of 102512663021 in words is "one hundred two billion, five hundred twelve million, six hundred sixty-three thousand, twenty-one".