220121102000 has 80 divisors (see below), whose sum is σ = 534955573152. Its totient is φ = 87601337600.

The previous prime is 220121101999. The next prime is 220121102039. The reversal of 220121102000 is 201121022.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114659 + ... + 673341.

Almost surely, 2^220121102000 is an apocalyptic number.

220121102000 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 220121102000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267477786576).

220121102000 is an abundant number, since it is smaller than the sum of its proper divisors (314834471152).

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

220121102000 is a wasteful number, since it uses less digits than its factorization.

220121102000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558903 (or 558887 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220121102000 its reverse (201121022), we get a palindrome (220322223022).

The spelling of 220121102000 in words is "two hundred twenty billion, one hundred twenty-one million, one hundred two thousand".