220121212220010 has 128 divisors (see below), whose sum is σ = 588102696115200. Its totient is φ = 58587724802880.

The previous prime is 220121212219957. The next prime is 220121212220023. The reversal of 220121212220010 is 10022212121022.

It is a happy number.

220121212220010 is a `hidden beast` number, since 2 + 201 + 21 + 212 + 220 + 0 + 10 = 666.

220121212220010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2667092445 + ... + 2667174975.

It is an arithmetic number, because the mean of its divisors is an integer number (4594552313400).

Almost surely, 2^{220121212220010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220121212220010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294051348057600).

220121212220010 is an abundant number, since it is smaller than the sum of its proper divisors (367981483895190).

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

220121212220010 is a wasteful number, since it uses less digits than its factorization.

220121212220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101153 (or 101147 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 220121212220010 its reverse (10022212121022), we get a palindrome (230143424341032).

The spelling of 220121212220010 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty thousand, ten".