31420321210100 has 18 divisors (see below), whose sum is σ = 68182097026134. Its totient is φ = 12568128484000.

The previous prime is 31420321210081. The next prime is 31420321210123. The reversal of 31420321210100 is 101212302413.

It can be written as a sum of positive squares in 3 ways, for example, as 219852205456 + 31200469004644 = 468884^2 + 5585738^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 157101605951 + ... + 157101606150.

Almost surely, 2^{31420321210100} is an apocalyptic number.

It is an amenable number.

31420321210100 is an abundant number, since it is smaller than the sum of its proper divisors (36761775816034).

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

31420321210100 is a wasteful number, since it uses less digits than its factorization.

31420321210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314203212115 (or 314203212108 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31420321210100 its reverse (101212302413), we get a palindrome (31521533512513).

The spelling of 31420321210100 in words is "thirty-one trillion, four hundred twenty billion, three hundred twenty-one million, two hundred ten thousand, one hundred".