210100012120 has 16 divisors (see below), whose sum is σ = 472725027360. Its totient is φ = 84040004832.

The previous prime is 210100012103. The next prime is 210100012139. The reversal of 210100012120 is 21210001012.

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

It is a junction number, because it is equal to n+sod(n) for n = 210100012097 and 210100012106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2626250112 + ... + 2626250191.

It is an arithmetic number, because the mean of its divisors is an integer number (29545314210).

Almost surely, 2^210100012120 is an apocalyptic number.

210100012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210100012120 is an abundant number, since it is smaller than the sum of its proper divisors (262625015240).

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

210100012120 is a wasteful number, since it uses less digits than its factorization.

210100012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252500314 (or 5252500310 counting only the distinct ones).

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

Adding to 210100012120 its reverse (21210001012), we get a palindrome (231310013132).

The spelling of 210100012120 in words is "two hundred ten billion, one hundred million, twelve thousand, one hundred twenty".