210121001112 has 64 divisors (see below), whose sum is σ = 588545337600. Its totient is φ = 61952135040.

The previous prime is 210121001107. The next prime is 210121001161. The reversal of 210121001112 is 211100121012.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10745812 + ... + 10765347.

It is an arithmetic number, because the mean of its divisors is an integer number (9196020900).

Almost surely, 2^210121001112 is an apocalyptic number.

210121001112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

210121001112 is an abundant number, since it is smaller than the sum of its proper divisors (378424336488).

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

210121001112 is a wasteful number, since it uses less digits than its factorization.

210121001112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21511216 (or 21511212 counting only the distinct ones).

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

Adding to 210121001112 its reverse (211100121012), we get a palindrome (421221122124).

The spelling of 210121001112 in words is "two hundred ten billion, one hundred twenty-one million, one thousand, one hundred twelve".