2106225221 has 4 divisors (see below), whose sum is σ = 2217079200. Its totient is φ = 1995371244.

The previous prime is 2106225167. The next prime is 2106225223. The reversal of 2106225221 is 1225226012.

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-2106225221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106225223) 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, 55426961 + ... + 55426998.

It is an arithmetic number, because the mean of its divisors is an integer number (554269800).

Almost surely, 2^2106225221 is an apocalyptic number.

It is an amenable number.

2106225221 is a deficient number, since it is larger than the sum of its proper divisors (110853979).

2106225221 is a wasteful number, since it uses less digits than its factorization.

2106225221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110853978.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2106225221 is about 45893.6294162926. The cubic root of 2106225221 is about 1281.8432957800.

The spelling of 2106225221 in words is "two billion, one hundred six million, two hundred twenty-five thousand, two hundred twenty-one".