40240111122221 has 4 divisors (see below), whose sum is σ = 40630791812832. Its totient is φ = 39849430431612.

The previous prime is 40240111122187. The next prime is 40240111122251. The reversal of 40240111122221 is 12222111104204.

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 40240111122221 - 2⁶ = 40240111122157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40240111122251) 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, 195340345151 + ... + 195340345356.

It is an arithmetic number, because the mean of its divisors is an integer number (10157697953208).

Almost surely, 2^{40240111122221} is an apocalyptic number.

It is an amenable number.

40240111122221 is a deficient number, since it is larger than the sum of its proper divisors (390680690611).

40240111122221 is a wasteful number, since it uses less digits than its factorization.

40240111122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390680690610.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 40240111122221 its reverse (12222111104204), we get a palindrome (52462222226425).

The spelling of 40240111122221 in words is "forty trillion, two hundred forty billion, one hundred eleven million, one hundred twenty-two thousand, two hundred twenty-one".