21153413120220 has 72 divisors (see below), whose sum is σ = 64226405421360. Its totient is φ = 5635542931200.

The previous prime is 21153413120201. The next prime is 21153413120227. The reversal of 21153413120220 is 2202131435112.

It is a happy number.

21153413120220 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 3 + 413 + 1 + 20 + 220 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21153413120227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55718985 + ... + 56097344.

It is an arithmetic number, because the mean of its divisors is an integer number (892033408630).

Almost surely, 2^{21153413120220} is an apocalyptic number.

21153413120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21153413120220 is an abundant number, since it is smaller than the sum of its proper divisors (43072992301140).

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

21153413120220 is a wasteful number, since it uses less digits than its factorization.

21153413120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111817395 (or 111817390 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 21153413120220 its reverse (2202131435112), we get a palindrome (23355544555332).

The spelling of 21153413120220 in words is "twenty-one trillion, one hundred fifty-three billion, four hundred thirteen million, one hundred twenty thousand, two hundred twenty".