31130133121 has 8 divisors (see below), whose sum is σ = 32809082400. Its totient is φ = 29455236000.

The previous prime is 31130133107. The next prime is 31130133131. The reversal of 31130133121 is 12133103113.

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 31130133121 - 2¹⁷ = 31130002049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31130133131) 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, 997255 + ... + 1027996.

It is an arithmetic number, because the mean of its divisors is an integer number (4101135300).

Almost surely, 2^31130133121 is an apocalyptic number.

It is an amenable number.

31130133121 is a deficient number, since it is larger than the sum of its proper divisors (1678949279).

31130133121 is a wasteful number, since it uses less digits than its factorization.

31130133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026079.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31130133121 its reverse (12133103113), we get a palindrome (43263236234).

The spelling of 31130133121 in words is "thirty-one billion, one hundred thirty million, one hundred thirty-three thousand, one hundred twenty-one".