31234101220 has 48 divisors (see below), whose sum is σ = 74981708928. Its totient is φ = 10705996800.

The previous prime is 31234101187. The next prime is 31234101229. The reversal of 31234101220 is 2210143213.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31234101229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539604 + ... + 594676.

It is an arithmetic number, because the mean of its divisors is an integer number (1562118936).

Almost surely, 2^31234101220 is an apocalyptic number.

It is an amenable number.

31234101220 is an abundant number, since it is smaller than the sum of its proper divisors (43747607708).

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

31234101220 is a wasteful number, since it uses less digits than its factorization.

31234101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59140 (or 59138 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31234101220 its reverse (2210143213), we get a palindrome (33444244433).

The spelling of 31234101220 in words is "thirty-one billion, two hundred thirty-four million, one hundred one thousand, two hundred twenty".