20210021111233 has 6 divisors (see below), whose sum is σ = 21468776751686. Its totient is φ = 19021196339712.

The previous prime is 20210021111221. The next prime is 20210021111251. The reversal of 20210021111233 is 33211112001202.

It can be written as a sum of positive squares in 3 ways, for example, as 2680793859969 + 17529227251264 = 1637313^2 + 4186792^2 .

It is not a de Polignac number, because 20210021111233 - 2²⁹ = 20209484240321 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 20210021111233.

It is not an unprimeable number, because it can be changed into a prime (20210021118233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34965434160 + ... + 34965434737.

Almost surely, 2^{20210021111233} is an apocalyptic number.

It is an amenable number.

20210021111233 is a deficient number, since it is larger than the sum of its proper divisors (1258755640453).

20210021111233 is an equidigital number, since it uses as much as digits as its factorization.

20210021111233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69930868931 (or 69930868914 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20210021111233 its reverse (33211112001202), we get a palindrome (53421133112435).

The spelling of 20210021111233 in words is "twenty trillion, two hundred ten billion, twenty-one million, one hundred eleven thousand, two hundred thirty-three".