99221211111 has 16 divisors (see below), whose sum is σ = 144332592768. Its totient is φ = 60129554400.

The previous prime is 99221211101. The next prime is 99221211143. The reversal of 99221211111 is 11111212299.

It is not a de Polignac number, because 99221211111 - 2¹⁴ = 99221194727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99221211101) 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, 363580 + ... + 575006.

It is an arithmetic number, because the mean of its divisors is an integer number (9020787048).

Almost surely, 2^99221211111 is an apocalyptic number.

99221211111 is a deficient number, since it is larger than the sum of its proper divisors (45111381657).

99221211111 is a wasteful number, since it uses less digits than its factorization.

99221211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225662.

The product of its digits is 648, while the sum is 30.

The spelling of 99221211111 in words is "ninety-nine billion, two hundred twenty-one million, two hundred eleven thousand, one hundred eleven".