221110901 has 4 divisors (see below), whose sum is σ = 241211904. Its totient is φ = 201009900.

The previous prime is 221110843. The next prime is 221110907. The reversal of 221110901 is 109011122.

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 not a de Polignac number, because 221110901 - 2¹⁸ = 220848757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221110901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110907) 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, 10050485 + ... + 10050506.

It is an arithmetic number, because the mean of its divisors is an integer number (60302976).

Almost surely, 2^221110901 is an apocalyptic number.

It is an amenable number.

221110901 is a deficient number, since it is larger than the sum of its proper divisors (20101003).

221110901 is a wasteful number, since it uses less digits than its factorization.

221110901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20101002.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 221110901 is about 14869.7982837697. The cubic root of 221110901 is about 604.6954740909.

The spelling of 221110901 in words is "two hundred twenty-one million, one hundred ten thousand, nine hundred one".