2221221234312 has 48 divisors (see below), whose sum is σ = 6105595694640. Its totient is φ = 729356224608.

The previous prime is 2221221234289. The next prime is 2221221234313. The reversal of 2221221234312 is 2134321221222.

2221221234312 is a `hidden beast` number, since 2 + 2 + 2 + 1 + 221 + 2 + 3 + 431 + 2 = 666.

It is a super-2 number, since 2×2221221234312² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2221221234313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230221258 + ... + 230230905.

It is an arithmetic number, because the mean of its divisors is an integer number (127199910305).

Almost surely, 2^{2221221234312} is an apocalyptic number.

It is an amenable number.

2221221234312 is an abundant number, since it is smaller than the sum of its proper divisors (3884374460328).

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

2221221234312 is a wasteful number, since it uses less digits than its factorization.

2221221234312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460452242 (or 460452235 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 2221221234312 its reverse (2134321221222), we get a palindrome (4355542455534).

The spelling of 2221221234312 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred thirty-four thousand, three hundred twelve".