220121343020 has 24 divisors (see below), whose sum is σ = 463284360000. Its totient is φ = 87852434432.

The previous prime is 220121342977. The next prime is 220121343023. The reversal of 220121343020 is 20343121022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 220121342983 and 220121343001.

It is not an unprimeable number, because it can be changed into a prime (220121343023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12247220 + ... + 12265179.

It is an arithmetic number, because the mean of its divisors is an integer number (19303515000).

Almost surely, 2^220121343020 is an apocalyptic number.

220121343020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121343020 is an abundant number, since it is smaller than the sum of its proper divisors (243163016980).

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

220121343020 is a wasteful number, since it uses less digits than its factorization.

220121343020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24512857 (or 24512855 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 220121343020 its reverse (20343121022), we get a palindrome (240464464042).

The spelling of 220121343020 in words is "two hundred twenty billion, one hundred twenty-one million, three hundred forty-three thousand, twenty".