1231102011 has 8 divisors (see below), whose sum is σ = 1653279040. Its totient is φ = 814829832.

The previous prime is 1231102007. The next prime is 1231102013. The reversal of 1231102011 is 1102011321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231102011 - 2² = 1231102007 is a prime.

It is a super-2 number, since 2×1231102011² = 3031224322976488242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231102013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475725 + ... + 1476558.

It is an arithmetic number, because the mean of its divisors is an integer number (206659880).

Almost surely, 2^1231102011 is an apocalyptic number.

1231102011 is a deficient number, since it is larger than the sum of its proper divisors (422177029).

1231102011 is a wasteful number, since it uses less digits than its factorization.

1231102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952425.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1231102011 is about 35087.0632997405. The cubic root of 1231102011 is about 1071.7611579333.

Adding to 1231102011 its reverse (1102011321), we get a palindrome (2333113332).

The spelling of 1231102011 in words is "one billion, two hundred thirty-one million, one hundred two thousand, eleven".