1231102240 has 24 divisors (see below), whose sum is σ = 2908479420. Its totient is φ = 492440832.

The previous prime is 1231102189. The next prime is 1231102253. The reversal of 1231102240 is 422011321.

It can be written as a sum of positive squares in 2 ways, for example, as 1140547984 + 90554256 = 33772^2 + 9516^2 .

It is a super-2 number, since 2×1231102240² = 3031225450666035200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3847035 + ... + 3847354.

Almost surely, 2^1231102240 is an apocalyptic number.

1231102240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231102240 is an abundant number, since it is smaller than the sum of its proper divisors (1677377180).

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

1231102240 is an equidigital number, since it uses as much as digits as its factorization.

1231102240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7694404 (or 7694396 counting only the distinct ones).

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

The square root of 1231102240 is about 35087.0665630514. The cubic root of 1231102240 is about 1071.7612243868.

Adding to 1231102240 its reverse (422011321), we get a palindrome (1653113561).

The spelling of 1231102240 in words is "one billion, two hundred thirty-one million, one hundred two thousand, two hundred forty".