9221434504921 has 4 divisors (see below), whose sum is σ = 9518900134144. Its totient is φ = 8923968875700.

The previous prime is 9221434504853. The next prime is 9221434504967. The reversal of 9221434504921 is 1294054341229.

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-9221434504921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9221434574921) 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, 148732814565 + ... + 148732814626.

It is an arithmetic number, because the mean of its divisors is an integer number (2379725033536).

Almost surely, 2^{9221434504921} is an apocalyptic number.

It is an amenable number.

9221434504921 is a deficient number, since it is larger than the sum of its proper divisors (297465629223).

9221434504921 is a wasteful number, since it uses less digits than its factorization.

9221434504921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297465629222.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 9221434504921 in words is "nine trillion, two hundred twenty-one billion, four hundred thirty-four million, five hundred four thousand, nine hundred twenty-one".