12100031551 has 4 divisors (see below), whose sum is σ = 12100720000. Its totient is φ = 12099343104.

The previous prime is 12100031539. The next prime is 12100031591. The reversal of 12100031551 is 15513000121.

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 12100031551 - 2⁵ = 12100031519 is a prime.

It is a super-4 number, since 4×12100031551⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100031591) 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, 317151 + ... + 353248.

It is an arithmetic number, because the mean of its divisors is an integer number (3025180000).

Almost surely, 2^12100031551 is an apocalyptic number.

12100031551 is a deficient number, since it is larger than the sum of its proper divisors (688449).

12100031551 is an equidigital number, since it uses as much as digits as its factorization.

12100031551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688448.

The product of its (nonzero) digits is 150, while the sum is 19.

Adding to 12100031551 its reverse (15513000121), we get a palindrome (27613031672).

The spelling of 12100031551 in words is "twelve billion, one hundred million, thirty-one thousand, five hundred fifty-one".