31301000131220 has 24 divisors (see below), whose sum is σ = 65732327315424. Its totient is φ = 12520356806816.

The previous prime is 31301000131207. The next prime is 31301000131223. The reversal of 31301000131220 is 2213100010313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301000131223) 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, 3589559 + ... + 8688321.

It is an arithmetic number, because the mean of its divisors is an integer number (2738846971476).

Almost surely, 2^{31301000131220} is an apocalyptic number.

It is an amenable number.

31301000131220 is an abundant number, since it is smaller than the sum of its proper divisors (34431327184204).

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

31301000131220 is a wasteful number, since it uses less digits than its factorization.

31301000131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5405719 (or 5405717 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31301000131220 its reverse (2213100010313), we get a palindrome (33514100141533).

The spelling of 31301000131220 in words is "thirty-one trillion, three hundred one billion, one hundred thirty-one thousand, two hundred twenty".