13621124220 has 96 divisors (see below), whose sum is σ = 42192493056. Its totient is φ = 3255571200.

The previous prime is 13621124207. The next prime is 13621124227. The reversal of 13621124220 is 2242112631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13621124227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98479 + ... + 192198.

It is an arithmetic number, because the mean of its divisors is an integer number (439505136).

Almost surely, 2^13621124220 is an apocalyptic number.

13621124220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13621124220 is an abundant number, since it is smaller than the sum of its proper divisors (28571368836).

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

13621124220 is a wasteful number, since it uses less digits than its factorization.

13621124220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290771 (or 290769 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 13621124220 its reverse (2242112631), we get a palindrome (15863236851).

The spelling of 13621124220 in words is "thirteen billion, six hundred twenty-one million, one hundred twenty-four thousand, two hundred twenty".