31123232141 has 4 divisors (see below), whose sum is σ = 31164346812. Its totient is φ = 31082117472.

The previous prime is 31123232123. The next prime is 31123232167. The reversal of 31123232141 is 14123232113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14123232113 = 4129 ⋅3420497.

It can be written as a sum of positive squares in 2 ways, for example, as 27753894025 + 3369338116 = 166595^2 + 58046^2 .

It is a cyclic number.

It is not a de Polignac number, because 31123232141 - 2²² = 31119037837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123202141) 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, 20556200 + ... + 20557713.

It is an arithmetic number, because the mean of its divisors is an integer number (7791086703).

Almost surely, 2^31123232141 is an apocalyptic number.

It is an amenable number.

31123232141 is a deficient number, since it is larger than the sum of its proper divisors (41114671).

31123232141 is an equidigital number, since it uses as much as digits as its factorization.

31123232141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41114670.

The product of its digits is 864, while the sum is 23.

Adding to 31123232141 its reverse (14123232113), we get a palindrome (45246464254).

The spelling of 31123232141 in words is "thirty-one billion, one hundred twenty-three million, two hundred thirty-two thousand, one hundred forty-one".