21202100220000 has 240 divisors, whose sum is σ = 79482434879232. Its totient is φ = 4846194240000.

The previous prime is 21202100219999. The next prime is 21202100220017. The reversal of 21202100220000 is 2200120212.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 24820596 + ... + 25660595.

Almost surely, 2^{21202100220000} is an apocalyptic number.

21202100220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202100220000 is an abundant number, since it is smaller than the sum of its proper divisors (58280334659232).

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

21202100220000 is an equidigital number, since it uses as much as digits as its factorization.

21202100220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50481231 (or 50481208 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21202100220000 its reverse (2200120212), we get a palindrome (21204300340212).

The spelling of 21202100220000 in words is "twenty-one trillion, two hundred two billion, one hundred million, two hundred twenty thousand".