31233120220100 has 144 divisors (see below), whose sum is σ = 73041767694336. Its totient is φ = 11558598480000.

The previous prime is 31233120220097. The next prime is 31233120220117. The reversal of 31233120220100 is 102202133213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138994037 + ... + 139218563.

Almost surely, 2^{31233120220100} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31233120220100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36520883847168).

31233120220100 is an abundant number, since it is smaller than the sum of its proper divisors (41808647474236).

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

31233120220100 is a wasteful number, since it uses less digits than its factorization.

31233120220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226546 (or 226539 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31233120220100 its reverse (102202133213), we get a palindrome (31335322353313).

The spelling of 31233120220100 in words is "thirty-one trillion, two hundred thirty-three billion, one hundred twenty million, two hundred twenty thousand, one hundred".