40111212221 has 8 divisors (see below), whose sum is σ = 42078787200. Its totient is φ = 38182599280.

The previous prime is 40111212199. The next prime is 40111212247. The reversal of 40111212221 is 12221211104.

40111212221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40111212221 - 2²⁶ = 40044103357 is a prime.

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 40111212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40111218221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9738401 + ... + 9742518.

It is an arithmetic number, because the mean of its divisors is an integer number (5259848400).

Almost surely, 2^40111212221 is an apocalyptic number.

It is an amenable number.

40111212221 is a deficient number, since it is larger than the sum of its proper divisors (1967574979).

40111212221 is a wasteful number, since it uses less digits than its factorization.

40111212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19481019.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 40111212221 its reverse (12221211104), we get a palindrome (52332423325).

The spelling of 40111212221 in words is "forty billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty-one".