102000021131 has 4 divisors (see below), whose sum is σ = 108000022392. Its totient is φ = 96000019872.

The previous prime is 102000021107. The next prime is 102000021157. The reversal of 102000021131 is 131120000201.

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

It is a cyclic number.

It is not a de Polignac number, because 102000021131 - 2²² = 101995826827 is a prime.

It is a super-2 number, since 2×102000021131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102000021191) 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, 3000000605 + ... + 3000000638.

It is an arithmetic number, because the mean of its divisors is an integer number (27000005598).

Almost surely, 2^102000021131 is an apocalyptic number.

102000021131 is a deficient number, since it is larger than the sum of its proper divisors (6000001261).

102000021131 is an equidigital number, since it uses as much as digits as its factorization.

102000021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000001260.

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

Adding to 102000021131 its reverse (131120000201), we get a palindrome (233120021332).

The spelling of 102000021131 in words is "one hundred two billion, twenty-one thousand, one hundred thirty-one".