13421120220 has 72 divisors (see below), whose sum is σ = 43105490064. Its totient is φ = 3368437248.

The previous prime is 13421120213. The next prime is 13421120257. The reversal of 13421120220 is 2202112431.

It is a happy number.

13421120220 is a `hidden beast` number, since 1 + 3 + 421 + 1 + 20 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13421120193 and 13421120202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2189934 + ... + 2196053.

It is an arithmetic number, because the mean of its divisors is an integer number (598687362).

Almost surely, 2^13421120220 is an apocalyptic number.

13421120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13421120220 is an abundant number, since it is smaller than the sum of its proper divisors (29684369844).

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

13421120220 is a wasteful number, since it uses less digits than its factorization.

13421120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4386019 (or 4386014 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 13421120220 its reverse (2202112431), we get a palindrome (15623232651).

The spelling of 13421120220 in words is "thirteen billion, four hundred twenty-one million, one hundred twenty thousand, two hundred twenty".