201200231200021 has 2 divisors, whose sum is σ = 201200231200022. Its totient is φ = 201200231200020.

The previous prime is 201200231199953. The next prime is 201200231200057. The reversal of 201200231200021 is 120002132002102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195280669209796 + 5919561990225 = 13974286^2 + 2433015^2 .

It is a cyclic number.

It is not a de Polignac number, because 201200231200021 - 2⁷ = 201200231199893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201200231199968 and 201200231200004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201200231200081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100600115600010 + 100600115600011.

It is an arithmetic number, because the mean of its divisors is an integer number (100600115600011).

Almost surely, 2^{201200231200021} is an apocalyptic number.

It is an amenable number.

201200231200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201200231200021 is an equidigital number, since it uses as much as digits as its factorization.

201200231200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 201200231200021 its reverse (120002132002102), we get a palindrome (321202363202123).

The spelling of 201200231200021 in words is "two hundred one trillion, two hundred billion, two hundred thirty-one million, two hundred thousand, twenty-one".