102021211431 has 48 divisors (see below), whose sum is σ = 151255069056. Its totient is φ = 66233852928.

The previous prime is 102021211429. The next prime is 102021211469. The reversal of 102021211431 is 134112120201.

102021211431 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 21 + 211 + 431 = 666.

It is not a de Polignac number, because 102021211431 - 2¹ = 102021211429 is a prime.

It is a super-2 number, since 2×102021211431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021211231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119602401 + ... + 119603253.

It is an arithmetic number, because the mean of its divisors is an integer number (3151147272).

Almost surely, 2^102021211431 is an apocalyptic number.

102021211431 is a deficient number, since it is larger than the sum of its proper divisors (49233857625).

102021211431 is a wasteful number, since it uses less digits than its factorization.

102021211431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992 (or 1989 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 102021211431 its reverse (134112120201), we get a palindrome (236133331632).

The spelling of 102021211431 in words is "one hundred two billion, twenty-one million, two hundred eleven thousand, four hundred thirty-one".