21002122021202 has 16 divisors (see below), whose sum is σ = 36459380002560. Its totient is φ = 8886973874688.

The previous prime is 21002122021201. The next prime is 21002122021211. The reversal of 21002122021202 is 20212022120012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21002122021201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9494629103 + ... + 9494631314.

It is an arithmetic number, because the mean of its divisors is an integer number (2278711250160).

Almost surely, 2^{21002122021202} is an apocalyptic number.

21002122021202 is a deficient number, since it is larger than the sum of its proper divisors (15457257981358).

21002122021202 is a wasteful number, since it uses less digits than its factorization.

21002122021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18989260505.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21002122021202 its reverse (20212022120012), we get a palindrome (41214144141214).

The spelling of 21002122021202 in words is "twenty-one trillion, two billion, one hundred twenty-two million, twenty-one thousand, two hundred two".