102021131231002 has 4 divisors (see below), whose sum is σ = 153031696846506. Its totient is φ = 51010565615500.

The previous prime is 102021131230957. The next prime is 102021131231051. The reversal of 102021131231002 is 200132131120201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 86178749129001 + 15842382102001 = 9283251^2 + 3980249^2 .

It is a super-2 number, since 2×102021131231002² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25505282807749 + ... + 25505282807752.

Almost surely, 2^{102021131231002} is an apocalyptic number.

102021131231002 is a deficient number, since it is larger than the sum of its proper divisors (51010565615504).

102021131231002 is an equidigital number, since it uses as much as digits as its factorization.

102021131231002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51010565615503.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 102021131231002 its reverse (200132131120201), we get a palindrome (302153262351203).

The spelling of 102021131231002 in words is "one hundred two trillion, twenty-one billion, one hundred thirty-one million, two hundred thirty-one thousand, two".