31123012234120 has 64 divisors (see below), whose sum is σ = 73714475736000. Its totient is φ = 11793651049728.

The previous prime is 31123012234021. The next prime is 31123012234121. The reversal of 31123012234120 is 2143221032113.

It is not an unprimeable number, because it can be changed into a prime (31123012234121) 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, 27279039 + ... + 28397041.

It is an arithmetic number, because the mean of its divisors is an integer number (1151788683375).

Almost surely, 2^{31123012234120} is an apocalyptic number.

It is an amenable number.

31123012234120 is an abundant number, since it is smaller than the sum of its proper divisors (42591463501880).

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

31123012234120 is a wasteful number, since it uses less digits than its factorization.

31123012234120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154662 (or 1154658 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31123012234120 its reverse (2143221032113), we get a palindrome (33266233266233).

The spelling of 31123012234120 in words is "thirty-one trillion, one hundred twenty-three billion, twelve million, two hundred thirty-four thousand, one hundred twenty".