1231340222 has 16 divisors (see below), whose sum is σ = 2113286112. Its totient is φ = 527112960.

The previous prime is 1231340183. The next prime is 1231340233. The reversal of 1231340222 is 2220431321.

It is a junction number, because it is equal to n+sod(n) for n = 1231340194 and 1231340203.

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, 37583 + ... + 62250.

It is an arithmetic number, because the mean of its divisors is an integer number (132080382).

Almost surely, 2^1231340222 is an apocalyptic number.

1231340222 is a deficient number, since it is larger than the sum of its proper divisors (881945890).

1231340222 is an equidigital number, since it uses as much as digits as its factorization.

1231340222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100723.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1231340222 is about 35090.4577057638. The cubic root of 1231340222 is about 1071.8302799692.

Adding to 1231340222 its reverse (2220431321), we get a palindrome (3451771543).

The spelling of 1231340222 in words is "one billion, two hundred thirty-one million, three hundred forty thousand, two hundred twenty-two".