31220121312234 has 32 divisors (see below), whose sum is σ = 69381656159040. Its totient is φ = 10406165784336.

The previous prime is 31220121312181. The next prime is 31220121312253. The reversal of 31220121312234 is 43221312102213.

31220121312234 is a `hidden beast` number, since 3 + 1 + 2 + 201 + 213 + 12 + 234 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31220121312198 and 31220121312207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13988244 + ... + 16065839.

It is an arithmetic number, because the mean of its divisors is an integer number (2168176754970).

Almost surely, 2^{31220121312234} is an apocalyptic number.

31220121312234 is an abundant number, since it is smaller than the sum of its proper divisors (38161534846806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31220121312234 is a wasteful number, since it uses less digits than its factorization.

31220121312234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30073331 (or 30073325 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 31220121312234 its reverse (43221312102213), we get a palindrome (74441433414447).

The spelling of 31220121312234 in words is "thirty-one trillion, two hundred twenty billion, one hundred twenty-one million, three hundred twelve thousand, two hundred thirty-four".