210121100112 has 80 divisors (see below), whose sum is σ = 676753684992. Its totient is φ = 54576908160.

The previous prime is 210121100083. The next prime is 210121100113. The reversal of 210121100112 is 211001121012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121100113) 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, 28421778 + ... + 28429169.

Almost surely, 2^210121100112 is an apocalyptic number.

210121100112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

210121100112 is an abundant number, since it is smaller than the sum of its proper divisors (466632584880).

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

210121100112 is a wasteful number, since it uses less digits than its factorization.

210121100112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56850976 (or 56850970 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210121100112 its reverse (211001121012), we get a palindrome (421122221124).

The spelling of 210121100112 in words is "two hundred ten billion, one hundred twenty-one million, one hundred thousand, one hundred twelve".