1222221233231 has 4 divisors (see below), whose sum is σ = 1223432553600. Its totient is φ = 1221009912864.

The previous prime is 1222221233227. The next prime is 1222221233249. The reversal of 1222221233231 is 1323321222221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1222221233231 - 2² = 1222221233227 is a prime.

It is a super-2 number, since 2×1222221233231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222221233231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222221233731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 605658671 + ... + 605660688.

It is an arithmetic number, because the mean of its divisors is an integer number (305858138400).

Almost surely, 2^{1222221233231} is an apocalyptic number.

1222221233231 is a deficient number, since it is larger than the sum of its proper divisors (1211320369).

1222221233231 is a wasteful number, since it uses less digits than its factorization.

1222221233231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211320368.

The product of its digits is 3456, while the sum is 26.

Adding to 1222221233231 its reverse (1323321222221), we get a palindrome (2545542455452).

The spelling of 1222221233231 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred thirty-three thousand, two hundred thirty-one".