891220022199 has 24 divisors (see below), whose sum is σ = 1423810973312. Its totient is φ = 533620301760.

The previous prime is 891220022197. The next prime is 891220022261. The reversal of 891220022199 is 991220022198.

It is not a de Polignac number, because 891220022199 - 2¹ = 891220022197 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891220022197) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102931687 + ... + 102940344.

Almost surely, 2^891220022199 is an apocalyptic number.

891220022199 is a deficient number, since it is larger than the sum of its proper divisors (532590951113).

891220022199 is a wasteful number, since it uses less digits than its factorization.

891220022199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205872087 (or 205872084 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

Subtracting 891220022199 from its reverse (991220022198), we obtain a palindrome (99999999999).

The spelling of 891220022199 in words is "eight hundred ninety-one billion, two hundred twenty million, twenty-two thousand, one hundred ninety-nine".