21202010021120 has 72 divisors (see below), whose sum is σ = 51481130809416. Its totient is φ = 8364628574208.

The previous prime is 21202010021089. The next prime is 21202010021183. The reversal of 21202010021120 is 2112001020212.

It can be written as a sum of positive squares in 4 ways, for example, as 5107021456384 + 16094988564736 = 2259872^2 + 4011856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21202010021095 and 21202010021104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113359097 + ... + 113545976.

Almost surely, 2^{21202010021120} is an apocalyptic number.

21202010021120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202010021120 is an abundant number, since it is smaller than the sum of its proper divisors (30279120788296).

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

21202010021120 is an equidigital number, since it uses as much as digits as its factorization.

21202010021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226905167 (or 226905153 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21202010021120 its reverse (2112001020212), we get a palindrome (23314011041332).

The spelling of 21202010021120 in words is "twenty-one trillion, two hundred two billion, ten million, twenty-one thousand, one hundred twenty".