40143323121 has 12 divisors (see below), whose sum is σ = 58832639376. Its totient is φ = 24329286520.

The previous prime is 40143323089. The next prime is 40143323131. The reversal of 40143323121 is 12132334104.

It is a happy number.

It is not a de Polignac number, because 40143323121 - 2⁵ = 40143323089 is a prime.

It is a super-2 number, since 2×40143323121² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40143323091 and 40143323100.

It is not an unprimeable number, because it can be changed into a prime (40143323131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55293471 + ... + 55294196.

It is an arithmetic number, because the mean of its divisors is an integer number (4902719948).

Almost surely, 2^40143323121 is an apocalyptic number.

It is an amenable number.

40143323121 is a deficient number, since it is larger than the sum of its proper divisors (18689316255).

40143323121 is a wasteful number, since it uses less digits than its factorization.

40143323121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110587692 (or 110587681 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 40143323121 its reverse (12132334104), we get a palindrome (52275657225).

The spelling of 40143323121 in words is "forty billion, one hundred forty-three million, three hundred twenty-three thousand, one hundred twenty-one".