40231121251081 has 4 divisors (see below), whose sum is σ = 40313058362064. Its totient is φ = 40149184140100.

The previous prime is 40231121251049. The next prime is 40231121251091. The reversal of 40231121251081 is 18015212113204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40231121251081 - 2⁵ = 40231121251049 is a prime.

It is a super-2 number, since 2×40231121251081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40231121251091) 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, 40968554755 + ... + 40968555736.

It is an arithmetic number, because the mean of its divisors is an integer number (10078264590516).

Almost surely, 2^{40231121251081} is an apocalyptic number.

It is an amenable number.

40231121251081 is a deficient number, since it is larger than the sum of its proper divisors (81937110983).

40231121251081 is an equidigital number, since it uses as much as digits as its factorization.

40231121251081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81937110982.

The product of its (nonzero) digits is 3840, while the sum is 31.

Adding to 40231121251081 its reverse (18015212113204), we get a palindrome (58246333364285).

The spelling of 40231121251081 in words is "forty trillion, two hundred thirty-one billion, one hundred twenty-one million, two hundred fifty-one thousand, eighty-one".