231200222020021 has 2 divisors, whose sum is σ = 231200222020022. Its totient is φ = 231200222020020.

The previous prime is 231200222019997. The next prime is 231200222020037. The reversal of 231200222020021 is 120020222002132.

231200222020021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116228451664900 + 114971770355121 = 10780930^2 + 10722489^2 .

It is a cyclic number.

It is not a de Polignac number, because 231200222020021 - 2²⁹ = 231199685149109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231200222020121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115600111010010 + 115600111010011.

It is an arithmetic number, because the mean of its divisors is an integer number (115600111010011).

Almost surely, 2^{231200222020021} is an apocalyptic number.

It is an amenable number.

231200222020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

231200222020021 is an equidigital number, since it uses as much as digits as its factorization.

231200222020021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 231200222020021 its reverse (120020222002132), we get a palindrome (351220444022153).

The spelling of 231200222020021 in words is "two hundred thirty-one trillion, two hundred billion, two hundred twenty-two million, twenty thousand, twenty-one".