21002223202000 has 40 divisors (see below), whose sum is σ = 50783375707272. Its totient is φ = 8400889280000.

The previous prime is 21002223201979. The next prime is 21002223202019. The reversal of 21002223202000 is 20232220012.

It can be written as a sum of positive squares in 4 ways, for example, as 3336745208976 + 17665477993024 = 1826676^2 + 4203032^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5250553801 + ... + 5250557800.

Almost surely, 2^{21002223202000} is an apocalyptic number.

21002223202000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002223202000 is an abundant number, since it is smaller than the sum of its proper divisors (29781152505272).

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

21002223202000 is a wasteful number, since it uses less digits than its factorization.

21002223202000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10501111624 (or 10501111608 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 21002223202000 its reverse (20232220012), we get a palindrome (21022455422012).

The spelling of 21002223202000 in words is "twenty-one trillion, two billion, two hundred twenty-three million, two hundred two thousand".