121231300213 has 2 divisors, whose sum is σ = 121231300214. Its totient is φ = 121231300212.

The previous prime is 121231300207. The next prime is 121231300247. The reversal of 121231300213 is 312003132121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113069442564 + 8161857649 = 336258^2 + 90343^2 .

It is a cyclic number.

It is not a de Polignac number, because 121231300213 - 2⁵ = 121231300181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121231300283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60615650106 + 60615650107.

It is an arithmetic number, because the mean of its divisors is an integer number (60615650107).

Almost surely, 2^121231300213 is an apocalyptic number.

It is an amenable number.

121231300213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121231300213 is an equidigital number, since it uses as much as digits as its factorization.

121231300213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 121231300213 its reverse (312003132121), we get a palindrome (433234432334).

The spelling of 121231300213 in words is "one hundred twenty-one billion, two hundred thirty-one million, three hundred thousand, two hundred thirteen".