1131100001231 has 16 divisors (see below), whose sum is σ = 1175337952128. Its totient is φ = 1087740729600.

The previous prime is 1131100001177. The next prime is 1131100001233. The reversal of 1131100001231 is 1321000011311.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131100001231 is a prime.

It is a super-2 number, since 2×1131100001231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131100001233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2525261 + ... + 2939241.

It is an arithmetic number, because the mean of its divisors is an integer number (73458622008).

Almost surely, 2^{1131100001231} is an apocalyptic number.

1131100001231 is a deficient number, since it is larger than the sum of its proper divisors (44237950897).

1131100001231 is an equidigital number, since it uses as much as digits as its factorization.

1131100001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415042.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 1131100001231 its reverse (1321000011311), we get a palindrome (2452100012542).

The spelling of 1131100001231 in words is "one trillion, one hundred thirty-one billion, one hundred million, one thousand, two hundred thirty-one".