231200222020121 has 2 divisors, whose sum is σ = 231200222020122. Its totient is φ = 231200222020120.

The previous prime is 231200222020109. The next prime is 231200222020151. The reversal of 231200222020121 is 121020222002132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208844725034521 + 22355496985600 = 14451461^2 + 4728160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231200222020121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231200222020093 and 231200222020102.

It is not a weakly prime, because it can be changed into another prime (231200222020151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115600111010060 + 115600111010061.

It is an arithmetic number, because the mean of its divisors is an integer number (115600111010061).

Almost surely, 2^{231200222020121} is an apocalyptic number.

It is an amenable number.

231200222020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

231200222020121 is an equidigital number, since it uses as much as digits as its factorization.

231200222020121 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 20.

Adding to 231200222020121 its reverse (121020222002132), we get a palindrome (352220444022253).

The spelling of 231200222020121 in words is "two hundred thirty-one trillion, two hundred billion, two hundred twenty-two million, twenty thousand, one hundred twenty-one".