2100221406 has 16 divisors (see below), whose sum is σ = 4667158800. Its totient is φ = 700073784.

The previous prime is 2100221369. The next prime is 2100221413. The reversal of 2100221406 is 6041220012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19446441 + ... + 19446548.

It is an arithmetic number, because the mean of its divisors is an integer number (291697425).

Almost surely, 2^2100221406 is an apocalyptic number.

2100221406 is an abundant number, since it is smaller than the sum of its proper divisors (2566937394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2100221406 is a wasteful number, since it uses less digits than its factorization.

2100221406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38893000 (or 38892994 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2100221406 is about 45828.1726233984. The cubic root of 2100221406 is about 1280.6241678362.

Adding to 2100221406 its reverse (6041220012), we get a palindrome (8141441418).

The spelling of 2100221406 in words is "two billion, one hundred million, two hundred twenty-one thousand, four hundred six".