221010199807 has 2 divisors, whose sum is σ = 221010199808. Its totient is φ = 221010199806.

The previous prime is 221010199799. The next prime is 221010199831. The reversal of 221010199807 is 708991010122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221010199807 - 2³ = 221010199799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221010199807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221010199607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505099903 + 110505099904.

It is an arithmetic number, because the mean of its divisors is an integer number (110505099904).

Almost surely, 2^221010199807 is an apocalyptic number.

221010199807 is a deficient number, since it is larger than the sum of its proper divisors (1).

221010199807 is an equidigital number, since it uses as much as digits as its factorization.

221010199807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 40.

The spelling of 221010199807 in words is "two hundred twenty-one billion, ten million, one hundred ninety-nine thousand, eight hundred seven".