210311120020 has 96 divisors (see below), whose sum is σ = 470534158080. Its totient is φ = 78783344640.

The previous prime is 210311120003. The next prime is 210311120051. The reversal of 210311120020 is 20021113012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11961796 + ... + 11979364.

It is an arithmetic number, because the mean of its divisors is an integer number (4901397480).

Almost surely, 2^210311120020 is an apocalyptic number.

210311120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210311120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235267079040).

210311120020 is an abundant number, since it is smaller than the sum of its proper divisors (260223038060).

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

210311120020 is a wasteful number, since it uses less digits than its factorization.

210311120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18145 (or 18143 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 210311120020 its reverse (20021113012), we get a palindrome (230332233032).

The spelling of 210311120020 in words is "two hundred ten billion, three hundred eleven million, one hundred twenty thousand, twenty".