210111212100020 has 96 divisors (see below), whose sum is σ = 562902596315136. Its totient is φ = 63966204086400.

The previous prime is 210111212099953. The next prime is 210111212100029. The reversal of 210111212100020 is 20001212111012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 210111212099968 and 210111212100004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210111212100029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1586397176 + ... + 1586529615.

It is an arithmetic number, because the mean of its divisors is an integer number (5863568711616).

Almost surely, 2^{210111212100020} is an apocalyptic number.

210111212100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210111212100020 is an abundant number, since it is smaller than the sum of its proper divisors (352791384215116).

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

210111212100020 is a wasteful number, since it uses less digits than its factorization.

210111212100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172926861 (or 3172926859 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210111212100020 its reverse (20001212111012), we get a palindrome (230112424211032).

The spelling of 210111212100020 in words is "two hundred ten trillion, one hundred eleven billion, two hundred twelve million, one hundred thousand, twenty".