201212222110220 has 48 divisors (see below), whose sum is σ = 437314046698368. Its totient is φ = 77712339210240.

The previous prime is 201212222110181. The next prime is 201212222110241. The reversal of 201212222110220 is 22011222212102.

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 = 201212222110192 and 201212222110201.

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, 1264769732 + ... + 1264928811.

It is an arithmetic number, because the mean of its divisors is an integer number (9110709306216).

Almost surely, 2^{201212222110220} is an apocalyptic number.

201212222110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212222110220 is an abundant number, since it is smaller than the sum of its proper divisors (236101824588148).

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

201212222110220 is a wasteful number, since it uses less digits than its factorization.

201212222110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529698690 (or 2529698688 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 201212222110220 its reverse (22011222212102), we get a palindrome (223223444322322).

The spelling of 201212222110220 in words is "two hundred one trillion, two hundred twelve billion, two hundred twenty-two million, one hundred ten thousand, two hundred twenty".