2100821361 has 8 divisors (see below), whose sum is σ = 2891453184. Its totient is φ = 1355368560.

The previous prime is 2100821347. The next prime is 2100821363. The reversal of 2100821361 is 1631280012.

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

It is not a de Polignac number, because 2100821361 - 2⁵ = 2100821329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100821363) 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, 11294646 + ... + 11294831.

It is an arithmetic number, because the mean of its divisors is an integer number (361431648).

Almost surely, 2^2100821361 is an apocalyptic number.

It is an amenable number.

2100821361 is a deficient number, since it is larger than the sum of its proper divisors (790631823).

2100821361 is a wasteful number, since it uses less digits than its factorization.

2100821361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22589511.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2100821361 is about 45834.7178566641. The cubic root of 2100821361 is about 1280.7460984292.

The spelling of 2100821361 in words is "two billion, one hundred million, eight hundred twenty-one thousand, three hundred sixty-one".