2100021033 has 32 divisors (see below), whose sum is σ = 3242004480. Its totient is φ = 1195004160.

The previous prime is 2100021029. The next prime is 2100021089. The reversal of 2100021033 is 3301200012.

It is a happy number.

It is not a de Polignac number, because 2100021033 - 2² = 2100021029 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100021013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242016 + ... + 250542.

It is an arithmetic number, because the mean of its divisors is an integer number (101312640).

Almost surely, 2^2100021033 is an apocalyptic number.

It is an amenable number.

2100021033 is a deficient number, since it is larger than the sum of its proper divisors (1141983447).

2100021033 is a wasteful number, since it uses less digits than its factorization.

2100021033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8997.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 2100021033 is about 45825.9864378280. The cubic root of 2100021033 is about 1280.5834402782.

Adding to 2100021033 its reverse (3301200012), we get a palindrome (5401221045).

The spelling of 2100021033 in words is "two billion, one hundred million, twenty-one thousand, thirty-three".