201112212111220 has 24 divisors (see below), whose sum is σ = 429259180607208. Its totient is φ = 79126116240000.

The previous prime is 201112212111211. The next prime is 201112212111233. The reversal of 201112212111220 is 22111212211102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7417855333476 + 193694356777744 = 2723574^2 + 13917412^2 .

It is a super-2 number, since 2×201112212111220² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82423036531 + ... + 82423038970.

It is an arithmetic number, because the mean of its divisors is an integer number (17885799191967).

Almost surely, 2^{201112212111220} is an apocalyptic number.

201112212111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201112212111220 is an abundant number, since it is smaller than the sum of its proper divisors (228146968495988).

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

201112212111220 is a wasteful number, since it uses less digits than its factorization.

201112212111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164846075571 (or 164846075569 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 201112212111220 its reverse (22111212211102), we get a palindrome (223223424322322).

The spelling of 201112212111220 in words is "two hundred one trillion, one hundred twelve billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty".