21100000210212 has 144 divisors (see below), whose sum is σ = 62739341199360. Its totient is φ = 5457588091200.

The previous prime is 21100000210127. The next prime is 21100000210241. The reversal of 21100000210212 is 21201200000112.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5278864 + ... + 8370567.

It is an arithmetic number, because the mean of its divisors is an integer number (435689869440).

Almost surely, 2^{21100000210212} is an apocalyptic number.

21100000210212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21100000210212 is an abundant number, since it is smaller than the sum of its proper divisors (41639340989148).

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

21100000210212 is a wasteful number, since it uses less digits than its factorization.

21100000210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13649702 (or 13649693 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21100000210212 its reverse (21201200000112), we get a palindrome (42301200210324).

The spelling of 21100000210212 in words is "twenty-one trillion, one hundred billion, two hundred ten thousand, two hundred twelve".