2100311221 has 8 divisors (see below), whose sum is σ = 2171316224. Its totient is φ = 2030313600.

The previous prime is 2100311209. The next prime is 2100311233. The reversal of 2100311221 is 1221130012.

It is an interprime number because it is at equal distance from previous prime (2100311209) and next prime (2100311233).

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 2100311221 - 2⁷ = 2100311093 is a prime.

It is a super-2 number, since 2×2100311221² = 8822614450117021682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100311201) 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, 247605 + ... + 255946.

It is an arithmetic number, because the mean of its divisors is an integer number (271414528).

Almost surely, 2^2100311221 is an apocalyptic number.

It is an amenable number.

2100311221 is a deficient number, since it is larger than the sum of its proper divisors (71005003).

2100311221 is an equidigital number, since it uses as much as digits as its factorization.

2100311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503691.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2100311221 is about 45829.1525232575. The cubic root of 2100311221 is about 1280.6424226767.

Adding to 2100311221 its reverse (1221130012), we get a palindrome (3321441233).

The spelling of 2100311221 in words is "two billion, one hundred million, three hundred eleven thousand, two hundred twenty-one".