21001022021202 has 32 divisors (see below), whose sum is σ = 42249512640960. Its totient is φ = 6959104877760.

The previous prime is 21001022021167. The next prime is 21001022021207. The reversal of 21001022021202 is 20212022010012.

It is a super-2 number, since 2×21001022021202² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21001022021207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8286552 + ... + 10519932.

It is an arithmetic number, because the mean of its divisors is an integer number (1320297270030).

Almost surely, 2^{21001022021202} is an apocalyptic number.

21001022021202 is an abundant number, since it is smaller than the sum of its proper divisors (21248490619758).

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

21001022021202 is a wasteful number, since it uses less digits than its factorization.

21001022021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242618.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21001022021202 its reverse (20212022010012), we get a palindrome (41213044031214).

The spelling of 21001022021202 in words is "twenty-one trillion, one billion, twenty-two million, twenty-one thousand, two hundred two".