221333112212 has 24 divisors (see below), whose sum is σ = 410205589416. Its totient is φ = 104134320128.

The previous prime is 221333112181. The next prime is 221333112227. The reversal of 221333112212 is 212211333122.

It can be written as a sum of positive squares in 4 ways, for example, as 48007439236 + 173325672976 = 219106^2 + 416324^2 .

It is a super-2 number, since 2×221333112212² (a number of 23 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, 30503 + ... + 666030.

It is an arithmetic number, because the mean of its divisors is an integer number (17091899559).

Almost surely, 2^221333112212 is an apocalyptic number.

It is an amenable number.

221333112212 is a deficient number, since it is larger than the sum of its proper divisors (188872477204).

221333112212 is a wasteful number, since it uses less digits than its factorization.

221333112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701227 (or 701225 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 221333112212 its reverse (212211333122), we get a palindrome (433544445334).

The spelling of 221333112212 in words is "two hundred twenty-one billion, three hundred thirty-three million, one hundred twelve thousand, two hundred twelve".