210111200020 has 48 divisors (see below), whose sum is σ = 455409420480. Its totient is φ = 81386832384.

The previous prime is 210111200017. The next prime is 210111200023. The reversal of 210111200020 is 20002111012.

It is an interprime number because it is at equal distance from previous prime (210111200017) and next prime (210111200023).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210111200023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1249749 + ... + 1407868.

It is an arithmetic number, because the mean of its divisors is an integer number (9487696260).

Almost surely, 2^210111200020 is an apocalyptic number.

210111200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210111200020 is an abundant number, since it is smaller than the sum of its proper divisors (245298220460).

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

210111200020 is a wasteful number, since it uses less digits than its factorization.

210111200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657752 (or 2657750 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 210111200020 its reverse (20002111012), we get a palindrome (230113311032).

The spelling of 210111200020 in words is "two hundred ten billion, one hundred eleven million, two hundred thousand, twenty".