74100222221 has 4 divisors (see below), whose sum is σ = 74101874112. Its totient is φ = 74098570332.

The previous prime is 74100222211. The next prime is 74100222247. The reversal of 74100222221 is 12222200147.

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-74100222221 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 (74100222211) 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, 756725 + ... + 849018.

It is an arithmetic number, because the mean of its divisors is an integer number (18525468528).

Almost surely, 2^74100222221 is an apocalyptic number.

It is an amenable number.

74100222221 is a deficient number, since it is larger than the sum of its proper divisors (1651891).

74100222221 is a wasteful number, since it uses less digits than its factorization.

74100222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651890.

The product of its (nonzero) digits is 896, while the sum is 23.

Adding to 74100222221 its reverse (12222200147), we get a palindrome (86322422368).

The spelling of 74100222221 in words is "seventy-four billion, one hundred million, two hundred twenty-two thousand, two hundred twenty-one".