40042111231 has 2 divisors, whose sum is σ = 40042111232. Its totient is φ = 40042111230.

The previous prime is 40042111223. The next prime is 40042111261. The reversal of 40042111231 is 13211124004.

40042111231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40042111231 - 2³ = 40042111223 is a prime.

It is a super-2 number, since 2×40042111231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40042111199 and 40042111208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40042111261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021055615 + 20021055616.

It is an arithmetic number, because the mean of its divisors is an integer number (20021055616).

Almost surely, 2^40042111231 is an apocalyptic number.

40042111231 is a deficient number, since it is larger than the sum of its proper divisors (1).

40042111231 is an equidigital number, since it uses as much as digits as its factorization.

40042111231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 40042111231 its reverse (13211124004), we get a palindrome (53253235235).

The spelling of 40042111231 in words is "forty billion, forty-two million, one hundred eleven thousand, two hundred thirty-one".