31121223103011 has 16 divisors (see below), whose sum is σ = 41995391106816. Its totient is φ = 20497274389536.

The previous prime is 31121223103007. The next prime is 31121223103039. The reversal of 31121223103011 is 11030132212113.

It is not a de Polignac number, because 31121223103011 - 2² = 31121223103007 is a prime.

It is a super-2 number, since 2×31121223103011² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31121223003011) 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, 22214121 + ... + 23573493.

It is an arithmetic number, because the mean of its divisors is an integer number (2624711944176).

Almost surely, 2^{31121223103011} is an apocalyptic number.

31121223103011 is a deficient number, since it is larger than the sum of its proper divisors (10874168003805).

31121223103011 is a wasteful number, since it uses less digits than its factorization.

31121223103011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451402.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31121223103011 its reverse (11030132212113), we get a palindrome (42151355315124).

The spelling of 31121223103011 in words is "thirty-one trillion, one hundred twenty-one billion, two hundred twenty-three million, one hundred three thousand, eleven".