40140012221 has 4 divisors (see below), whose sum is σ = 40251823200. Its totient is φ = 40028201244.

The previous prime is 40140012191. The next prime is 40140012257. The reversal of 40140012221 is 12221004104.

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 a de Polignac number, because none of the positive numbers 2^k-40140012221 is a prime.

It is a super-2 number, since 2×40140012221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40140012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140017221) 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, 55904951 + ... + 55905668.

It is an arithmetic number, because the mean of its divisors is an integer number (10062955800).

Almost surely, 2^40140012221 is an apocalyptic number.

It is an amenable number.

40140012221 is a deficient number, since it is larger than the sum of its proper divisors (111810979).

40140012221 is a wasteful number, since it uses less digits than its factorization.

40140012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111810978.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 40140012221 its reverse (12221004104), we get a palindrome (52361016325).

The spelling of 40140012221 in words is "forty billion, one hundred forty million, twelve thousand, two hundred twenty-one".