2100121033 has 4 divisors (see below), whose sum is σ = 2101714560. Its totient is φ = 2098527508.

The previous prime is 2100121021. The next prime is 2100121039. The reversal of 2100121033 is 3301210012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2100121033 - 2¹³ = 2100112841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100121039) 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, 794785 + ... + 797422.

It is an arithmetic number, because the mean of its divisors is an integer number (525428640).

Almost surely, 2^2100121033 is an apocalyptic number.

It is an amenable number.

2100121033 is a deficient number, since it is larger than the sum of its proper divisors (1593527).

2100121033 is a wasteful number, since it uses less digits than its factorization.

2100121033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593526.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2100121033 is about 45827.0775088266. The cubic root of 2100121033 is about 1280.6037664733.

Adding to 2100121033 its reverse (3301210012), we get a palindrome (5401331045).

The spelling of 2100121033 in words is "two billion, one hundred million, one hundred twenty-one thousand, thirty-three".