9900221102 has 4 divisors (see below), whose sum is σ = 14850331656. Its totient is φ = 4950110550.

The previous prime is 9900221083. The next prime is 9900221137. The reversal of 9900221102 is 2011220099.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2475055274 + ... + 2475055277.

It is an arithmetic number, because the mean of its divisors is an integer number (3712582914).

Almost surely, 2^9900221102 is an apocalyptic number.

9900221102 is a deficient number, since it is larger than the sum of its proper divisors (4950110554).

9900221102 is a wasteful number, since it uses less digits than its factorization.

9900221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4950110553.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 9900221102 is about 99499.8547838136. The cubic root of 9900221102 is about 2147.2451539728.

The spelling of 9900221102 in words is "nine billion, nine hundred million, two hundred twenty-one thousand, one hundred two".