102001000021031 has 2 divisors, whose sum is σ = 102001000021032. Its totient is φ = 102001000021030.

The previous prime is 102001000021027. The next prime is 102001000021187. The reversal of 102001000021031 is 130120000100201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102001000021031 - 2² = 102001000021027 is a prime.

It is a super-2 number, since 2×102001000021031² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102001000021001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000500010515 + 51000500010516.

It is an arithmetic number, because the mean of its divisors is an integer number (51000500010516).

Almost surely, 2^{102001000021031} is an apocalyptic number.

102001000021031 is a deficient number, since it is larger than the sum of its proper divisors (1).

102001000021031 is an equidigital number, since it uses as much as digits as its factorization.

102001000021031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 102001000021031 its reverse (130120000100201), we get a palindrome (232121000121232).

The spelling of 102001000021031 in words is "one hundred two trillion, one billion, twenty-one thousand, thirty-one".