10221766421 has 8 divisors (see below), whose sum is σ = 10696761600. Its totient is φ = 9749318832.

The previous prime is 10221766397. The next prime is 10221766427. The reversal of 10221766421 is 12466712201.

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 10221766421 - 2³⁰ = 9148024597 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 (10221766427) 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, 628685 + ... + 644738.

It is an arithmetic number, because the mean of its divisors is an integer number (1337095200).

Almost surely, 2^10221766421 is an apocalyptic number.

It is an amenable number.

10221766421 is a deficient number, since it is larger than the sum of its proper divisors (474995179).

10221766421 is a wasteful number, since it uses less digits than its factorization.

10221766421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273795.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 10221766421 in words is "ten billion, two hundred twenty-one million, seven hundred sixty-six thousand, four hundred twenty-one".