31121112221123 has 8 divisors (see below), whose sum is σ = 32487639863328. Its totient is φ = 29755704229504.

The previous prime is 31121112221093. The next prime is 31121112221159. The reversal of 31121112221123 is 32112221112113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31121112221123 - 2¹⁴ = 31121112204739 is a prime.

It is a super-2 number, since 2×31121112221123² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31121112221183) 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, 279855836 + ... + 279967017.

It is an arithmetic number, because the mean of its divisors is an integer number (4060954982916).

Almost surely, 2^{31121112221123} is an apocalyptic number.

31121112221123 is a deficient number, since it is larger than the sum of its proper divisors (1366527642205).

31121112221123 is a wasteful number, since it uses less digits than its factorization.

31121112221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559825293.

The product of its digits is 288, while the sum is 23.

Adding to 31121112221123 its reverse (32112221112113), we get a palindrome (63233333333236).

The spelling of 31121112221123 in words is "thirty-one trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty-three".