1139561106231 has 4 divisors (see below), whose sum is σ = 1519414808312. Its totient is φ = 759707404152.

The previous prime is 1139561106169. The next prime is 1139561106293. The reversal of 1139561106231 is 1326011659311.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1139561106169) and next prime (1139561106293).

It is not a de Polignac number, because 1139561106231 - 2¹⁵ = 1139561073463 is a prime.

It is a super-2 number, since 2×1139561106231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1139561106231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139561106031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189926851036 + ... + 189926851041.

It is an arithmetic number, because the mean of its divisors is an integer number (379853702078).

Almost surely, 2^{1139561106231} is an apocalyptic number.

1139561106231 is a deficient number, since it is larger than the sum of its proper divisors (379853702081).

1139561106231 is an equidigital number, since it uses as much as digits as its factorization.

1139561106231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379853702080.

The product of its (nonzero) digits is 29160, while the sum is 39.

The spelling of 1139561106231 in words is "one trillion, one hundred thirty-nine billion, five hundred sixty-one million, one hundred six thousand, two hundred thirty-one".