122320013 has 4 divisors (see below), whose sum is σ = 122347260. Its totient is φ = 122292768.

The previous prime is 122319979. The next prime is 122320027. The reversal of 122320013 is 310023221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68194564 + 54125449 = 8258^2 + 7357^2 .

It is a cyclic number.

It is not a de Polignac number, because 122320013 - 2¹² = 122315917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122320013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122320063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5120 + ... + 16457.

It is an arithmetic number, because the mean of its divisors is an integer number (30586815).

Almost surely, 2^122320013 is an apocalyptic number.

It is an amenable number.

122320013 is a deficient number, since it is larger than the sum of its proper divisors (27247).

122320013 is an equidigital number, since it uses as much as digits as its factorization.

122320013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27246.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 122320013 is about 11059.8378378709. The cubic root of 122320013 is about 496.4008382337.

Adding to 122320013 its reverse (310023221), we get a palindrome (432343234).

The spelling of 122320013 in words is "one hundred twenty-two million, three hundred twenty thousand, thirteen".