21100211220112 has 20 divisors (see below), whose sum is σ = 40989526425520. Its totient is φ = 10522268916768.

The previous prime is 21100211220089. The next prime is 21100211220161. The reversal of 21100211220112 is 21102211200112.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 1739787078 + ... + 1739799205.

It is an arithmetic number, because the mean of its divisors is an integer number (2049476321276).

Almost surely, 2^{21100211220112} is an apocalyptic number.

It is an amenable number.

21100211220112 is a deficient number, since it is larger than the sum of its proper divisors (19889315205408).

21100211220112 is a wasteful number, since it uses less digits than its factorization.

21100211220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479586670 (or 3479586664 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21100211220112 its reverse (21102211200112), we get a palindrome (42202422420224).

The spelling of 21100211220112 in words is "twenty-one trillion, one hundred billion, two hundred eleven million, two hundred twenty thousand, one hundred twelve".