31000401121 has 16 divisors (see below), whose sum is σ = 35224963200. Its totient is φ = 27123199488.

The previous prime is 31000401059. The next prime is 31000401127. The reversal of 31000401121 is 12110400013.

It is a cyclic number.

It is not a de Polignac number, because 31000401121 - 2³¹ = 28852917473 is a prime.

It is a super-2 number, since 2×31000401121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31000401127) 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, 1210416 + ... + 1235761.

It is an arithmetic number, because the mean of its divisors is an integer number (2201560200).

Almost surely, 2^31000401121 is an apocalyptic number.

It is an amenable number.

31000401121 is a deficient number, since it is larger than the sum of its proper divisors (4224562079).

31000401121 is a wasteful number, since it uses less digits than its factorization.

31000401121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446248.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31000401121 its reverse (12110400013), we get a palindrome (43110801134).

The spelling of 31000401121 in words is "thirty-one billion, four hundred one thousand, one hundred twenty-one".