101421002531 has 2 divisors, whose sum is σ = 101421002532. Its totient is φ = 101421002530.

The previous prime is 101421002509. The next prime is 101421002597. The reversal of 101421002531 is 135200124101.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101421002531 is a prime.

It is a super-2 number, since 2×101421002531² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (101421005531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50710501265 + 50710501266.

It is an arithmetic number, because the mean of its divisors is an integer number (50710501266).

Almost surely, 2^101421002531 is an apocalyptic number.

101421002531 is a deficient number, since it is larger than the sum of its proper divisors (1).

101421002531 is an equidigital number, since it uses as much as digits as its factorization.

101421002531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 101421002531 its reverse (135200124101), we get a palindrome (236621126632).

The spelling of 101421002531 in words is "one hundred one billion, four hundred twenty-one million, two thousand, five hundred thirty-one".