1222122231 has 24 divisors (see below), whose sum is σ = 2039051664. Its totient is φ = 697109760.

The previous prime is 1222122229. The next prime is 1222122259. The reversal of 1222122231 is 1322212221.

1222122231 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1222122231 - 2¹ = 1222122229 is a prime.

It is a super-2 number, since 2×1222122231² = 2987165495008834722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222122211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 361396 + ... + 364761.

It is an arithmetic number, because the mean of its divisors is an integer number (84960486).

Almost surely, 2^1222122231 is an apocalyptic number.

1222122231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1222122231 is a deficient number, since it is larger than the sum of its proper divisors (816929433).

1222122231 is a wasteful number, since it uses less digits than its factorization.

1222122231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726191 (or 726188 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 1222122231 is about 34958.8648414104. The cubic root of 1222122231 is about 1069.1489523600.

Adding to 1222122231 its reverse (1322212221), we get a palindrome (2544334452).

The spelling of 1222122231 in words is "one billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred thirty-one".