121320311213 has 2 divisors, whose sum is σ = 121320311214. Its totient is φ = 121320311212.

The previous prime is 121320311209. The next prime is 121320311227. The reversal of 121320311213 is 312113023121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109525916809 + 11794394404 = 330947^2 + 108602^2 .

It is a cyclic number.

It is not a de Polignac number, because 121320311213 - 2² = 121320311209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121320311263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660155606 + 60660155607.

It is an arithmetic number, because the mean of its divisors is an integer number (60660155607).

Almost surely, 2^121320311213 is an apocalyptic number.

It is an amenable number.

121320311213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121320311213 is an equidigital number, since it uses as much as digits as its factorization.

121320311213 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 20.

Adding to 121320311213 its reverse (312113023121), we get a palindrome (433433334334).

The spelling of 121320311213 in words is "one hundred twenty-one billion, three hundred twenty million, three hundred eleven thousand, two hundred thirteen".