21101110200212 has 24 divisors (see below), whose sum is σ = 42203507364480. Its totient is φ = 9043057164960.

The previous prime is 21101110200173. The next prime is 21101110200251. The reversal of 21101110200212 is 21200201110112.

It is an interprime number because it is at equal distance from previous prime (21101110200173) and next prime (21101110200251).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10554839 + ... + 12393822.

It is an arithmetic number, because the mean of its divisors is an integer number (1758479473520).

Almost surely, 2^{21101110200212} is an apocalyptic number.

It is an amenable number.

21101110200212 is an abundant number, since it is smaller than the sum of its proper divisors (21102397164268).

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

21101110200212 is a wasteful number, since it uses less digits than its factorization.

21101110200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22981511 (or 22981509 counting only the distinct ones).

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

Adding to 21101110200212 its reverse (21200201110112), we get a palindrome (42301311310324).

The spelling of 21101110200212 in words is "twenty-one trillion, one hundred one billion, one hundred ten million, two hundred thousand, two hundred twelve".