13121212131 has 6 divisors (see below), whose sum is σ = 18952861980. Its totient is φ = 8747474748.

The previous prime is 13121212121. The next prime is 13121212133.

13121212131 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13121212131 - 2⁷ = 13121212003 is a prime.

It is a super-2 number, since 2×13121212131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13121212133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 728956221 + ... + 728956238.

It is an arithmetic number, because the mean of its divisors is an integer number (3158810330).

Almost surely, 2^13121212131 is an apocalyptic number.

13121212131 is a deficient number, since it is larger than the sum of its proper divisors (5831649849).

13121212131 is a wasteful number, since it uses less digits than its factorization.

13121212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457912465 (or 1457912462 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The spelling of 13121212131 in words is "thirteen billion, one hundred twenty-one million, two hundred twelve thousand, one hundred thirty-one".