12121013131 has 8 divisors (see below), whose sum is σ = 12255361200. Its totient is φ = 11986946400.

The previous prime is 12121013129. The next prime is 12121013153. The reversal of 12121013131 is 13131012121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12121013131 - 2¹ = 12121013129 is a prime.

It is a super-2 number, since 2×12121013131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121013171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16905 + ... + 156613.

It is an arithmetic number, because the mean of its divisors is an integer number (1531920150).

Almost surely, 2^12121013131 is an apocalyptic number.

12121013131 is a deficient number, since it is larger than the sum of its proper divisors (134348069).

12121013131 is a wasteful number, since it uses less digits than its factorization.

12121013131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140669.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 12121013131 its reverse (13131012121), we get a palindrome (25252025252).

The spelling of 12121013131 in words is "twelve billion, one hundred twenty-one million, thirteen thousand, one hundred thirty-one".