4002764247221 has 2 divisors, whose sum is σ = 4002764247222. Its totient is φ = 4002764247220.

The previous prime is 4002764247187. The next prime is 4002764247263. The reversal of 4002764247221 is 1227424672004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3998556130321 + 4208116900 = 1999639^2 + 64870^2 .

It is a cyclic number.

It is not a de Polignac number, because 4002764247221 - 2²⁶ = 4002697138357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4002764747221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001382123610 + 2001382123611.

It is an arithmetic number, because the mean of its divisors is an integer number (2001382123611).

Almost surely, 2^{4002764247221} is an apocalyptic number.

It is an amenable number.

4002764247221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002764247221 is an equidigital number, since it uses as much as digits as its factorization.

4002764247221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 301056, while the sum is 41.

The spelling of 4002764247221 in words is "four trillion, two billion, seven hundred sixty-four million, two hundred forty-seven thousand, two hundred twenty-one".