40231120981 has 2 divisors, whose sum is σ = 40231120982. Its totient is φ = 40231120980.

The previous prime is 40231120949. The next prime is 40231121003. The reversal of 40231120981 is 18902113204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37274480356 + 2956640625 = 193066^2 + 54375^2 .

It is a cyclic number.

It is not a de Polignac number, because 40231120981 - 2⁵ = 40231120949 is a prime.

It is a super-2 number, since 2×40231120981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40231120081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20115560490 + 20115560491.

It is an arithmetic number, because the mean of its divisors is an integer number (20115560491).

Almost surely, 2^40231120981 is an apocalyptic number.

It is an amenable number.

40231120981 is a deficient number, since it is larger than the sum of its proper divisors (1).

40231120981 is an equidigital number, since it uses as much as digits as its factorization.

40231120981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 40231120981 in words is "forty billion, two hundred thirty-one million, one hundred twenty thousand, nine hundred eighty-one".