2021233100021 has 8 divisors (see below), whose sum is σ = 2022863091840. Its totient is φ = 2019603480912.

The previous prime is 2021233099967. The next prime is 2021233100027. The reversal of 2021233100021 is 1200013321202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021233100021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021233100027) 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, 11316416 + ... + 11493638.

It is an arithmetic number, because the mean of its divisors is an integer number (252857886480).

Almost surely, 2^{2021233100021} is an apocalyptic number.

It is an amenable number.

2021233100021 is a deficient number, since it is larger than the sum of its proper divisors (1629991819).

2021233100021 is a wasteful number, since it uses less digits than its factorization.

2021233100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186355.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 2021233100021 its reverse (1200013321202), we get a palindrome (3221246421223).

The spelling of 2021233100021 in words is "two trillion, twenty-one billion, two hundred thirty-three million, one hundred thousand, twenty-one".