11231431109 has 2 divisors, whose sum is σ = 11231431110. Its totient is φ = 11231431108.

The previous prime is 11231431103. The next prime is 11231431129. The reversal of 11231431109 is 90113413211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7652400484 + 3579030625 = 87478^2 + 59825^2 .

It is a cyclic number.

It is not a de Polignac number, because 11231431109 - 2²⁴ = 11214653893 is a prime.

It is a super-2 number, since 2×11231431109² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11231431103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5615715554 + 5615715555.

It is an arithmetic number, because the mean of its divisors is an integer number (5615715555).

Almost surely, 2^11231431109 is an apocalyptic number.

It is an amenable number.

11231431109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11231431109 is an equidigital number, since it uses as much as digits as its factorization.

11231431109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 11231431109 in words is "eleven billion, two hundred thirty-one million, four hundred thirty-one thousand, one hundred nine".