201220111312 has 80 divisors (see below), whose sum is σ = 465852772800. Its totient is φ = 83115038720.

The previous prime is 201220111307. The next prime is 201220111327. The reversal of 201220111312 is 213111022102.

It is a super-2 number, since 2×201220111312² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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, 1072762 + ... + 1246297.

It is an arithmetic number, because the mean of its divisors is an integer number (5823159660).

Almost surely, 2^201220111312 is an apocalyptic number.

201220111312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

201220111312 is an abundant number, since it is smaller than the sum of its proper divisors (264632661488).

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

201220111312 is a wasteful number, since it uses less digits than its factorization.

201220111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319124 (or 2319118 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 201220111312 its reverse (213111022102), we get a palindrome (414331133414).

The spelling of 201220111312 in words is "two hundred one billion, two hundred twenty million, one hundred eleven thousand, three hundred twelve".