1231211022 has 32 divisors (see below), whose sum is σ = 2571229440. Its totient is φ = 392293440.

The previous prime is 1231210993. The next prime is 1231211029. The reversal of 1231211022 is 2201121321.

It is a junction number, because it is equal to n+sod(n) for n = 1231210992 and 1231211010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231211029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346129 + ... + 349667.

It is an arithmetic number, because the mean of its divisors is an integer number (80350920).

Almost surely, 2^1231211022 is an apocalyptic number.

1231211022 is an abundant number, since it is smaller than the sum of its proper divisors (1340018418).

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

1231211022 is a wasteful number, since it uses less digits than its factorization.

1231211022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6088.

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

The square root of 1231211022 is about 35088.6167011468. The cubic root of 1231211022 is about 1071.7927909218.

Adding to 1231211022 its reverse (2201121321), we get a palindrome (3432332343).

The spelling of 1231211022 in words is "one billion, two hundred thirty-one million, two hundred eleven thousand, twenty-two".