219686702121 has 16 divisors (see below), whose sum is σ = 325529932800. Its totient is φ = 146427133104.

The previous prime is 219686702101. The next prime is 219686702173. The reversal of 219686702121 is 121207686912.

It is not a de Polignac number, because 219686702121 - 2⁹ = 219686701609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (219686702101) 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, 720201 + ... + 978806.

It is an arithmetic number, because the mean of its divisors is an integer number (20345620800).

Almost surely, 2^219686702121 is an apocalyptic number.

It is an amenable number.

219686702121 is a deficient number, since it is larger than the sum of its proper divisors (105843230679).

219686702121 is a wasteful number, since it uses less digits than its factorization.

219686702121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703805 (or 1703799 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 219686702121 in words is "two hundred nineteen billion, six hundred eighty-six million, seven hundred two thousand, one hundred twenty-one".