220121000221200 has 480 divisors, whose sum is σ = 780703631769600. Its totient is φ = 52672690022400.

The previous prime is 220121000221181. The next prime is 220121000221219. The reversal of 220121000221200 is 2122000121022.

It is an interprime number because it is at equal distance from previous prime (220121000221181) and next prime (220121000221219).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 220121000221200.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 140761201 + ... + 142316399.

It is an arithmetic number, because the mean of its divisors is an integer number (1626465899520).

Almost surely, 2^{220121000221200} is an apocalyptic number.

220121000221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220121000221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390351815884800).

220121000221200 is an abundant number, since it is smaller than the sum of its proper divisors (560582631548400).

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

220121000221200 is a wasteful number, since it uses less digits than its factorization.

220121000221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555487 (or 1555476 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 220121000221200 its reverse (2122000121022), we get a palindrome (222243000342222).

The spelling of 220121000221200 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred twenty-one thousand, two hundred".