220101220101220 has 48 divisors (see below), whose sum is σ = 465938702233200. Its totient is φ = 87333361238016.

The previous prime is 220101220101157. The next prime is 220101220101251. The reversal of 220101220101220 is 22101022101022.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 18520060608036 + 201581159493184 = 4303494^2 + 14197928^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220101220101194 and 220101220101203.

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, 80344897 + ... + 83039176.

It is an arithmetic number, because the mean of its divisors is an integer number (9707056296525).

Almost surely, 2^{220101220101220} is an apocalyptic number.

220101220101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220101220101220 is an abundant number, since it is smaller than the sum of its proper divisors (245837482131980).

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

220101220101220 is a wasteful number, since it uses less digits than its factorization.

220101220101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163384624 (or 163384622 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220101220101220 its reverse (22101022101022), we get a palindrome (242202242202242).

The spelling of 220101220101220 in words is "two hundred twenty trillion, one hundred one billion, two hundred twenty million, one hundred one thousand, two hundred twenty".