22101901 has 4 divisors (see below), whose sum is σ = 22518972. Its totient is φ = 21684832.

The previous prime is 22101889. The next prime is 22101907. The reversal of 22101901 is 10910122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15721225 + 6380676 = 3965^2 + 2526^2 .

It is a cyclic number.

It is not a de Polignac number, because 22101901 - 2⁷ = 22101773 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 (22101907) 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, 208456 + ... + 208561.

It is an arithmetic number, because the mean of its divisors is an integer number (5629743).

Almost surely, 2^22101901 is an apocalyptic number.

It is an amenable number.

22101901 is a deficient number, since it is larger than the sum of its proper divisors (417071).

22101901 is an equidigital number, since it uses as much as digits as its factorization.

22101901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417070.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 22101901 is about 4701.2658933526. The cubic root of 22101901 is about 280.6358889663.

The spelling of 22101901 in words is "twenty-two million, one hundred one thousand, nine hundred one".