21011313220002 has 40 divisors (see below), whose sum is σ = 53806749201216. Its totient is φ = 6003232348248.

The previous prime is 21011313219991. The next prime is 21011313220003. The reversal of 21011313220002 is 20002231311012.

21011313220002 is a `hidden beast` number, since 210 + 1 + 131 + 322 + 0 + 0 + 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 (21011313220003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9264246318 + ... + 9264248585.

Almost surely, 2^{21011313220002} is an apocalyptic number.

21011313220002 is an abundant number, since it is smaller than the sum of its proper divisors (32795435981214).

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

21011313220002 is a wasteful number, since it uses less digits than its factorization.

21011313220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18528494924 (or 18528494915 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21011313220002 its reverse (20002231311012), we get a palindrome (41013544531014).

The spelling of 21011313220002 in words is "twenty-one trillion, eleven billion, three hundred thirteen million, two hundred twenty thousand, two".