221010097 has 16 divisors (see below), whose sum is σ = 275882112. Its totient is φ = 172005120.

The previous prime is 221010091. The next prime is 221010107. The reversal of 221010097 is 790010122.

It is not a de Polignac number, because 221010097 - 2³ = 221010089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221010091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98763 + ... + 100975.

It is an arithmetic number, because the mean of its divisors is an integer number (17242632).

Almost surely, 2^221010097 is an apocalyptic number.

It is an amenable number.

221010097 is a deficient number, since it is larger than the sum of its proper divisors (54872015).

221010097 is a wasteful number, since it uses less digits than its factorization.

221010097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3528.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 221010097 is about 14866.4083422998. The cubic root of 221010097 is about 604.6035669863.

The spelling of 221010097 in words is "two hundred twenty-one million, ten thousand, ninety-seven".