123021111113 has 2 divisors, whose sum is σ = 123021111114. Its totient is φ = 123021111112.

The previous prime is 123021111007. The next prime is 123021111121. The reversal of 123021111113 is 311111120321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119884215049 + 3136896064 = 346243^2 + 56008^2 .

It is a cyclic number.

It is not a de Polignac number, because 123021111113 - 2¹⁶ = 123021045577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123021111091 and 123021111100.

It is not a weakly prime, because it can be changed into another prime (123021119113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510555556 + 61510555557.

It is an arithmetic number, because the mean of its divisors is an integer number (61510555557).

Almost surely, 2^123021111113 is an apocalyptic number.

It is an amenable number.

123021111113 is a deficient number, since it is larger than the sum of its proper divisors (1).

123021111113 is an equidigital number, since it uses as much as digits as its factorization.

123021111113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 123021111113 its reverse (311111120321), we get a palindrome (434132231434).

The spelling of 123021111113 in words is "one hundred twenty-three billion, twenty-one million, one hundred eleven thousand, one hundred thirteen".