199213260871 has 2 divisors, whose sum is σ = 199213260872. Its totient is φ = 199213260870.

The previous prime is 199213260809. The next prime is 199213260901. The reversal of 199213260871 is 178062312991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199213260871 - 2²¹ = 199211163719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199213260671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99606630435 + 99606630436.

It is an arithmetic number, because the mean of its divisors is an integer number (99606630436).

Almost surely, 2^199213260871 is an apocalyptic number.

199213260871 is a deficient number, since it is larger than the sum of its proper divisors (1).

199213260871 is an equidigital number, since it uses as much as digits as its factorization.

199213260871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 199213260871 in words is "one hundred ninety-nine billion, two hundred thirteen million, two hundred sixty thousand, eight hundred seventy-one".