219943870757221 has 16 divisors (see below), whose sum is σ = 237123591239808. Its totient is φ = 202801482331200.

The previous prime is 219943870757167. The next prime is 219943870757323. The reversal of 219943870757221 is 122757078349912.

It is a cyclic number.

It is not a de Polignac number, because 219943870757221 - 2²³ = 219943862368613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219943870757921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101067630 + ... + 103220896.

It is an arithmetic number, because the mean of its divisors is an integer number (14820224452488).

Almost surely, 2^{219943870757221} is an apocalyptic number.

It is an amenable number.

219943870757221 is a deficient number, since it is larger than the sum of its proper divisors (17179720482587).

219943870757221 is a wasteful number, since it uses less digits than its factorization.

219943870757221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161932.

The product of its (nonzero) digits is 106686720, while the sum is 67.

The spelling of 219943870757221 in words is "two hundred nineteen trillion, nine hundred forty-three billion, eight hundred seventy million, seven hundred fifty-seven thousand, two hundred twenty-one".