31212231030100 has 72 divisors (see below), whose sum is σ = 68169649675680. Its totient is φ = 12403968769920.

The previous prime is 31212231030023. The next prime is 31212231030131. The reversal of 31212231030100 is 103013221213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144756171 + ... + 144971629.

It is an arithmetic number, because the mean of its divisors is an integer number (946800689940).

Almost surely, 2^{31212231030100} 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 31212231030100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34084824837840).

31212231030100 is an abundant number, since it is smaller than the sum of its proper divisors (36957418645580).

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

31212231030100 is a wasteful number, since it uses less digits than its factorization.

31212231030100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224857 (or 224850 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31212231030100 its reverse (103013221213), we get a palindrome (31315244251313).

The spelling of 31212231030100 in words is "thirty-one trillion, two hundred twelve billion, two hundred thirty-one million, thirty thousand, one hundred".