2102911221 has 8 divisors (see below), whose sum is σ = 2805457824. Its totient is φ = 1401152720.

The previous prime is 2102911211. The next prime is 2102911273. The reversal of 2102911221 is 1221192012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2102911221 - 2⁵ = 2102911189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102911201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190770 + ... + 201491.

It is an arithmetic number, because the mean of its divisors is an integer number (350682228).

Almost surely, 2^2102911221 is an apocalyptic number.

It is an amenable number.

2102911221 is a deficient number, since it is larger than the sum of its proper divisors (702546603).

2102911221 is a wasteful number, since it uses less digits than its factorization.

2102911221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394051.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 2102911221 is about 45857.5099738309. The cubic root of 2102911221 is about 1281.1706455521.

The spelling of 2102911221 in words is "two billion, one hundred two million, nine hundred eleven thousand, two hundred twenty-one".