102040120131 has 4 divisors (see below), whose sum is σ = 136053493512. Its totient is φ = 68026746752.

The previous prime is 102040120109. The next prime is 102040120139. The reversal of 102040120131 is 131021040201.

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 102040120131 - 2¹⁰ = 102040119107 is a prime.

It is a super-2 number, since 2×102040120131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102040120131.

It is not an unprimeable number, because it can be changed into a prime (102040120139) 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, 17006686686 + ... + 17006686691.

It is an arithmetic number, because the mean of its divisors is an integer number (34013373378).

Almost surely, 2^102040120131 is an apocalyptic number.

102040120131 is a deficient number, since it is larger than the sum of its proper divisors (34013373381).

102040120131 is an equidigital number, since it uses as much as digits as its factorization.

102040120131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34013373380.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 102040120131 its reverse (131021040201), we get a palindrome (233061160332).

The spelling of 102040120131 in words is "one hundred two billion, forty million, one hundred twenty thousand, one hundred thirty-one".