1231210222 has 16 divisors (see below), whose sum is σ = 2120745600. Its totient is φ = 530186040.

The previous prime is 1231210163. The next prime is 1231210237. The reversal of 1231210222 is 2220121321.

It is a happy number.

It is a super-2 number, since 2×1231210222² = 3031757221514578568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231210196 and 1231210205.

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, 1472322 + ... + 1473157.

It is an arithmetic number, because the mean of its divisors is an integer number (132546600).

Almost surely, 2^1231210222 is an apocalyptic number.

1231210222 is a deficient number, since it is larger than the sum of its proper divisors (889535378).

1231210222 is a wasteful number, since it uses less digits than its factorization.

1231210222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2945511.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1231210222 is about 35088.6053014365. The cubic root of 1231210222 is about 1071.7925587833.

Adding to 1231210222 its reverse (2220121321), we get a palindrome (3451331543).

The spelling of 1231210222 in words is "one billion, two hundred thirty-one million, two hundred ten thousand, two hundred twenty-two".