99021011102221 has 4 divisors (see below), whose sum is σ = 106638011956252. Its totient is φ = 91404010248192.

The previous prime is 99021011102183. The next prime is 99021011102239. The reversal of 99021011102221 is 12220111012099.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9220484075625 + 89800527026596 = 3036525^2 + 9476314^2 .

It is a cyclic number.

It is not a de Polignac number, because 99021011102221 - 2⁷ = 99021011102093 is a prime.

It is a super-2 number, since 2×99021011102221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99021011102261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3808500426996 + ... + 3808500427021.

It is an arithmetic number, because the mean of its divisors is an integer number (26659502989063).

Almost surely, 2^{99021011102221} is an apocalyptic number.

It is an amenable number.

99021011102221 is a deficient number, since it is larger than the sum of its proper divisors (7617000854031).

99021011102221 is a wasteful number, since it uses less digits than its factorization.

99021011102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7617000854030.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 99021011102221 in words is "ninety-nine trillion, twenty-one billion, eleven million, one hundred two thousand, two hundred twenty-one".