12111020131 has 8 divisors (see below), whose sum is σ = 13926082304. Its totient is φ = 10317187080.

The previous prime is 12111020123. The next prime is 12111020137. The reversal of 12111020131 is 13102011121.

It is a happy number.

12111020131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12111020131 - 2³ = 12111020123 is a prime.

It is a super-2 number, since 2×12111020131² (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 (12111020137) 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 7 ways as a sum of consecutive naturals, for example, 5306055 + ... + 5308336.

It is an arithmetic number, because the mean of its divisors is an integer number (1740760288).

Almost surely, 2^12111020131 is an apocalyptic number.

12111020131 is a deficient number, since it is larger than the sum of its proper divisors (1815062173).

12111020131 is a wasteful number, since it uses less digits than its factorization.

12111020131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10614561.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 12111020131 its reverse (13102011121), we get a palindrome (25213031252).

The spelling of 12111020131 in words is "twelve billion, one hundred eleven million, twenty thousand, one hundred thirty-one".