221011110097 has 4 divisors (see below), whose sum is σ = 223673894640. Its totient is φ = 218348325556.

The previous prime is 221011110083. The next prime is 221011110161. The reversal of 221011110097 is 790011110122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221011110097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221011110037) 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, 1331392147 + ... + 1331392312.

It is an arithmetic number, because the mean of its divisors is an integer number (55918473660).

Almost surely, 2^221011110097 is an apocalyptic number.

It is an amenable number.

221011110097 is a deficient number, since it is larger than the sum of its proper divisors (2662784543).

221011110097 is an equidigital number, since it uses as much as digits as its factorization.

221011110097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662784542.

The product of its (nonzero) digits is 252, while the sum is 25.

Adding to 221011110097 its sum of digits (25), we get a palindrome (221011110122).

The spelling of 221011110097 in words is "two hundred twenty-one billion, eleven million, one hundred ten thousand, ninety-seven".