2100621233 has 4 divisors (see below), whose sum is σ = 2122277220. Its totient is φ = 2078965248.

The previous prime is 2100621217. The next prime is 2100621283. The reversal of 2100621233 is 3321260012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 793943329 + 1306677904 = 28177^2 + 36148^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100621233 - 2⁴ = 2100621217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2100621203) 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, 10827848 + ... + 10828041.

It is an arithmetic number, because the mean of its divisors is an integer number (530569305).

Almost surely, 2^2100621233 is an apocalyptic number.

It is an amenable number.

2100621233 is a deficient number, since it is larger than the sum of its proper divisors (21655987).

2100621233 is an equidigital number, since it uses as much as digits as its factorization.

2100621233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21655986.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2100621233 is about 45832.5346560716. The cubic root of 2100621233 is about 1280.7054284165.

Adding to 2100621233 its reverse (3321260012), we get a palindrome (5421881245).

The spelling of 2100621233 in words is "two billion, one hundred million, six hundred twenty-one thousand, two hundred thirty-three".