201331223312 has 20 divisors (see below), whose sum is σ = 413025083676. Its totient is φ = 94744104960.

The previous prime is 201331223309. The next prime is 201331223417. The reversal of 201331223312 is 213322133102.

It can be written as a sum of positive squares in 2 ways, for example, as 56081817856 + 145249405456 = 236816^2 + 381116^2 .

It is a super-2 number, since 2×201331223312² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370093889 + ... + 370094432.

Almost surely, 2^201331223312 is an apocalyptic number.

It is an amenable number.

201331223312 is an abundant number, since it is smaller than the sum of its proper divisors (211693860364).

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

201331223312 is a wasteful number, since it uses less digits than its factorization.

201331223312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740188346 (or 740188340 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 201331223312 its reverse (213322133102), we get a palindrome (414653356414).

The spelling of 201331223312 in words is "two hundred one billion, three hundred thirty-one million, two hundred twenty-three thousand, three hundred twelve".