21202000203120 has 160 divisors (see below), whose sum is σ = 74173769003520. Its totient is φ = 4962641617920.

The previous prime is 21202000203023. The next prime is 21202000203133. The reversal of 21202000203120 is 2130200020212.

It is a happy number.

It is a super-2 number, since 2×21202000203120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21202000203120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138390004 + ... + 138543123.

It is an arithmetic number, because the mean of its divisors is an integer number (463586056272).

Almost surely, 2^{21202000203120} is an apocalyptic number.

21202000203120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202000203120 is an abundant number, since it is smaller than the sum of its proper divisors (52971768800400).

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

21202000203120 is a wasteful number, since it uses less digits than its factorization.

21202000203120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276933183 (or 276933177 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21202000203120 its reverse (2130200020212), we get a palindrome (23332200223332).

The spelling of 21202000203120 in words is "twenty-one trillion, two hundred two billion, two hundred three thousand, one hundred twenty".