749999022221 has 16 divisors (see below), whose sum is σ = 777479472000. Its totient is φ = 722627505600.

The previous prime is 749999022209. The next prime is 749999022259. The reversal of 749999022221 is 122220999947.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749999022221 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 (749999022271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49690886 + ... + 49705976.

It is an arithmetic number, because the mean of its divisors is an integer number (48592467000).

Almost surely, 2^749999022221 is an apocalyptic number.

It is an amenable number.

749999022221 is a deficient number, since it is larger than the sum of its proper divisors (27480449779).

749999022221 is a wasteful number, since it uses less digits than its factorization.

749999022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18580.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 749999022221 in words is "seven hundred forty-nine billion, nine hundred ninety-nine million, twenty-two thousand, two hundred twenty-one".