31030331133121 has 16 divisors (see below), whose sum is σ = 32742371211264. Its totient is φ = 29375831119824.

The previous prime is 31030331133091. The next prime is 31030331133187. The reversal of 31030331133121 is 12133113303013.

It is a cyclic number.

It is not a de Polignac number, because 31030331133121 - 2⁹ = 31030331132609 is a prime.

It is a super-2 number, since 2×31030331133121² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31030331143121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74325571 + ... + 74741896.

It is an arithmetic number, because the mean of its divisors is an integer number (2046398200704).

Almost surely, 2^{31030331133121} is an apocalyptic number.

It is an amenable number.

31030331133121 is a deficient number, since it is larger than the sum of its proper divisors (1712040078143).

31030331133121 is a wasteful number, since it uses less digits than its factorization.

31030331133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149067660.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 31030331133121 its reverse (12133113303013), we get a palindrome (43163444436134).

The spelling of 31030331133121 in words is "thirty-one trillion, thirty billion, three hundred thirty-one million, one hundred thirty-three thousand, one hundred twenty-one".