4722840351221 has 2 divisors, whose sum is σ = 4722840351222. Its totient is φ = 4722840351220.

The previous prime is 4722840351211. The next prime is 4722840351283. The reversal of 4722840351221 is 1221530482274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4030100415121 + 692739936100 = 2007511^2 + 832310^2 .

It is a cyclic number.

It is not a de Polignac number, because 4722840351221 - 2³⁰ = 4721766609397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4722840351211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2361420175610 + 2361420175611.

It is an arithmetic number, because the mean of its divisors is an integer number (2361420175611).

Almost surely, 2^{4722840351221} is an apocalyptic number.

It is an amenable number.

4722840351221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4722840351221 is an equidigital number, since it uses as much as digits as its factorization.

4722840351221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 4722840351221 in words is "four trillion, seven hundred twenty-two billion, eight hundred forty million, three hundred fifty-one thousand, two hundred twenty-one".