40442312102221 has 4 divisors (see below), whose sum is σ = 40442365666944. Its totient is φ = 40442258537500.

The previous prime is 40442312102167. The next prime is 40442312102243. The reversal of 40442312102221 is 12220121324404.

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-40442312102221 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 40442312102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40442312102321) 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, 25633405 + ... + 27165346.

It is an arithmetic number, because the mean of its divisors is an integer number (10110591416736).

Almost surely, 2^{40442312102221} is an apocalyptic number.

It is an amenable number.

40442312102221 is a deficient number, since it is larger than the sum of its proper divisors (53564723).

40442312102221 is an equidigital number, since it uses as much as digits as its factorization.

40442312102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53564722.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 40442312102221 its reverse (12220121324404), we get a palindrome (52662433426625).

The spelling of 40442312102221 in words is "forty trillion, four hundred forty-two billion, three hundred twelve million, one hundred two thousand, two hundred twenty-one".