1231242222 has 32 divisors (see below), whose sum is σ = 2832920064. Its totient is φ = 349452000.

The previous prime is 1231242191. The next prime is 1231242223. The reversal of 1231242222 is 2222421321.

1231242222 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231242223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90729 + ... + 103412.

It is an arithmetic number, because the mean of its divisors is an integer number (88528752).

Almost surely, 2^1231242222 is an apocalyptic number.

1231242222 is an abundant number, since it is smaller than the sum of its proper divisors (1601677842).

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

1231242222 is a wasteful number, since it uses less digits than its factorization.

1231242222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194304.

The product of its digits is 768, while the sum is 21.

The square root of 1231242222 is about 35089.0612869595. The cubic root of 1231242222 is about 1071.8018442446.

Adding to 1231242222 its reverse (2222421321), we get a palindrome (3453663543).

The spelling of 1231242222 in words is "one billion, two hundred thirty-one million, two hundred forty-two thousand, two hundred twenty-two".