1231011222 has 32 divisors (see below), whose sum is σ = 2871168000. Its totient is φ = 351716904.

The previous prime is 1231011217. The next prime is 1231011233. The reversal of 1231011222 is 2221101321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297022 + ... + 301137.

It is an arithmetic number, because the mean of its divisors is an integer number (89724000).

Almost surely, 2^1231011222 is an apocalyptic number.

1231011222 is an abundant number, since it is smaller than the sum of its proper divisors (1640156778).

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

1231011222 is an equidigital number, since it uses as much as digits as its factorization.

1231011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598185 (or 598171 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1231011222 is about 35085.7695084489. The cubic root of 1231011222 is about 1071.7348112090.

Adding to 1231011222 its reverse (2221101321), we get a palindrome (3452112543).

Subtracting 1231011222 from its reverse (2221101321), we obtain a palindrome (990090099).

It can be divided in two parts, 12310 and 11222, that added together give a palindrome (23532).

The spelling of 1231011222 in words is "one billion, two hundred thirty-one million, eleven thousand, two hundred twenty-two".