20211233311021 has 4 divisors (see below), whose sum is σ = 20211936119200. Its totient is φ = 20210530502844.

The previous prime is 20211233311013. The next prime is 20211233311051. The reversal of 20211233311021 is 12011333211202.

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 20211233311021 - 2³ = 20211233311013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211233310983 and 20211233311001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211233311051) 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, 351360951 + ... + 351418468.

It is an arithmetic number, because the mean of its divisors is an integer number (5052984029800).

Almost surely, 2^{20211233311021} is an apocalyptic number.

It is an amenable number.

20211233311021 is a deficient number, since it is larger than the sum of its proper divisors (702808179).

20211233311021 is an equidigital number, since it uses as much as digits as its factorization.

20211233311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702808178.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20211233311021 its reverse (12011333211202), we get a palindrome (32222566522223).

The spelling of 20211233311021 in words is "twenty trillion, two hundred eleven billion, two hundred thirty-three million, three hundred eleven thousand, twenty-one".