21112212211002 has 48 divisors (see below), whose sum is σ = 49918572980640. Its totient is φ = 6395463079200.

The previous prime is 21112212210953. The next prime is 21112212211007. The reversal of 21112212211002 is 20011221221112.

21112212211002 is a `hidden beast` number, since 211 + 1 + 221 + 221 + 10 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21112212211007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17558149 + ... + 18721992.

It is an arithmetic number, because the mean of its divisors is an integer number (1039970270430).

Almost surely, 2^{21112212211002} is an apocalyptic number.

21112212211002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21112212211002 is an abundant number, since it is smaller than the sum of its proper divisors (28806360769638).

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

21112212211002 is a wasteful number, since it uses less digits than its factorization.

21112212211002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36283099 (or 36283096 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21112212211002 its reverse (20011221221112), we get a palindrome (41123433432114).

The spelling of 21112212211002 in words is "twenty-one trillion, one hundred twelve billion, two hundred twelve million, two hundred eleven thousand, two".