9142064221 has 2 divisors, whose sum is σ = 9142064222. Its totient is φ = 9142064220.

The previous prime is 9142064209. The next prime is 9142064231. The reversal of 9142064221 is 1224602419.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9142036996 + 27225 = 95614^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 9142064221 - 2⁹ = 9142063709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9142064201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4571032110 + 4571032111.

It is an arithmetic number, because the mean of its divisors is an integer number (4571032111).

Almost surely, 2^9142064221 is an apocalyptic number.

It is an amenable number.

9142064221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9142064221 is an equidigital number, since it uses as much as digits as its factorization.

9142064221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 9142064221 is about 95614.1423692123. The cubic root of 9142064221 is about 2090.9713837288.

The spelling of 9142064221 in words is "nine billion, one hundred forty-two million, sixty-four thousand, two hundred twenty-one".