1222121231 has 8 divisors (see below), whose sum is σ = 1244443200. Its totient is φ = 1199970720.

The previous prime is 1222121207. The next prime is 1222121233. The reversal of 1222121231 is 1321212221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222121231 - 2⁶ = 1222121167 is a prime.

It is a super-2 number, since 2×1222121231² = 2987160606521910722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222121233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28436 + ... + 57033.

It is an arithmetic number, because the mean of its divisors is an integer number (155555400).

Almost surely, 2^1222121231 is an apocalyptic number.

1222121231 is a deficient number, since it is larger than the sum of its proper divisors (22321969).

1222121231 is an equidigital number, since it uses as much as digits as its factorization.

1222121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85729.

The product of its digits is 96, while the sum is 17.

The square root of 1222121231 is about 34958.8505388836. The cubic root of 1222121231 is about 1069.1486607500.

Adding to 1222121231 its reverse (1321212221), we get a palindrome (2543333452).

The spelling of 1222121231 in words is "one billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred thirty-one".