123020511013321 has 2 divisors, whose sum is σ = 123020511013322. Its totient is φ = 123020511013320.

The previous prime is 123020511013319. The next prime is 123020511013333. The reversal of 123020511013321 is 123310115020321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97048604255625 + 25971906757696 = 9851325^2 + 5096264^2 .

It is a cyclic number.

It is not a de Polignac number, because 123020511013321 - 2¹ = 123020511013319 is a prime.

It is a super-2 number, since 2×123020511013321² (a number of 29 digits) contains 22 as substring.

Together with 123020511013319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (123020511013021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510255506660 + 61510255506661.

It is an arithmetic number, because the mean of its divisors is an integer number (61510255506661).

Almost surely, 2^{123020511013321} is an apocalyptic number.

It is an amenable number.

123020511013321 is a deficient number, since it is larger than the sum of its proper divisors (1).

123020511013321 is an equidigital number, since it uses as much as digits as its factorization.

123020511013321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 123020511013321 its reverse (123310115020321), we get a palindrome (246330626033642).

The spelling of 123020511013321 in words is "one hundred twenty-three trillion, twenty billion, five hundred eleven million, thirteen thousand, three hundred twenty-one".