20133031102021 has 4 divisors (see below), whose sum is σ = 20133532250572. Its totient is φ = 20132529953472.

The previous prime is 20133031102013. The next prime is 20133031102033. The reversal of 20133031102021 is 12020113033102.

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 19754344711396 + 378686390625 = 4444586^2 + 615375^2 .

It is a cyclic number.

It is not a de Polignac number, because 20133031102021 - 2³ = 20133031102013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20133031102021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133035102021) 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, 250514010 + ... + 250594363.

It is an arithmetic number, because the mean of its divisors is an integer number (5033383062643).

Almost surely, 2^{20133031102021} is an apocalyptic number.

It is an amenable number.

20133031102021 is a deficient number, since it is larger than the sum of its proper divisors (501148551).

20133031102021 is an equidigital number, since it uses as much as digits as its factorization.

20133031102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501148550.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20133031102021 its reverse (12020113033102), we get a palindrome (32153144135123).

The spelling of 20133031102021 in words is "twenty trillion, one hundred thirty-three billion, thirty-one million, one hundred two thousand, twenty-one".