221331001001012 has 24 divisors (see below), whose sum is σ = 461908176003456. Its totient is φ = 90731963143008.

The previous prime is 221331001001009. The next prime is 221331001001021. The reversal of 221331001001012 is 210100100133122.

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, 171840838643 + ... + 171840839930.

It is an arithmetic number, because the mean of its divisors is an integer number (19246174000144).

Almost surely, 2^{221331001001012} is an apocalyptic number.

It is an amenable number.

221331001001012 is an abundant number, since it is smaller than the sum of its proper divisors (240577175002444).

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

221331001001012 is a wasteful number, since it uses less digits than its factorization.

221331001001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343681678607 (or 343681678605 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 221331001001012 its reverse (210100100133122), we get a palindrome (431431101134134).

The spelling of 221331001001012 in words is "two hundred twenty-one trillion, three hundred thirty-one billion, one million, one thousand, twelve".