9211221101 has 8 divisors (see below), whose sum is σ = 9226605024. Its totient is φ = 9195851920.

The previous prime is 9211221083. The next prime is 9211221113. The reversal of 9211221101 is 1011221129.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9211221101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9211221161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2148506 + ... + 2152788.

It is an arithmetic number, because the mean of its divisors is an integer number (1153325628).

Almost surely, 2^9211221101 is an apocalyptic number.

It is an amenable number.

9211221101 is a deficient number, since it is larger than the sum of its proper divisors (15383923).

9211221101 is a wasteful number, since it uses less digits than its factorization.

9211221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7371.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 9211221101 is about 95975.1066735536. The cubic root of 9211221101 is about 2096.2306609735.

The spelling of 9211221101 in words is "nine billion, two hundred eleven million, two hundred twenty-one thousand, one hundred one".