31220121312233 has 32 divisors (see below), whose sum is σ = 37947312864000. Its totient is φ = 25073771433984.

The previous prime is 31220121312181. The next prime is 31220121312253. The reversal of 31220121312233 is 33221312102213.

It is not a de Polignac number, because 31220121312233 - 2⁶ = 31220121312169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31220121312253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 351466241 + ... + 351555057.

It is an arithmetic number, because the mean of its divisors is an integer number (1185853527000).

Almost surely, 2^{31220121312233} is an apocalyptic number.

It is an amenable number.

31220121312233 is a deficient number, since it is larger than the sum of its proper divisors (6727191551767).

31220121312233 is a wasteful number, since it uses less digits than its factorization.

31220121312233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101969.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31220121312233 its reverse (33221312102213), we get a palindrome (64441433414446).

The spelling of 31220121312233 in words is "thirty-one trillion, two hundred twenty billion, one hundred twenty-one million, three hundred twelve thousand, two hundred thirty-three".