1231101042 has 16 divisors (see below), whose sum is σ = 2462713632. Its totient is φ = 410281760.

The previous prime is 1231101041. The next prime is 1231101061. The reversal of 1231101042 is 2401011321.

It is a super-2 number, since 2×1231101042² = 3031219551226971528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231101041) 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 7 ways as a sum of consecutive naturals, for example, 14638 + ... + 51734.

It is an arithmetic number, because the mean of its divisors is an integer number (153919602).

Almost surely, 2^1231101042 is an apocalyptic number.

1231101042 is an abundant number, since it is smaller than the sum of its proper divisors (1231612590).

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

1231101042 is a wasteful number, since it uses less digits than its factorization.

1231101042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42633.

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

The square root of 1231101042 is about 35087.0494912297. The cubic root of 1231101042 is about 1071.7608767389.

Adding to 1231101042 its reverse (2401011321), we get a palindrome (3632112363).

The spelling of 1231101042 in words is "one billion, two hundred thirty-one million, one hundred one thousand, forty-two".