122300021 has 2 divisors, whose sum is σ = 122300022. Its totient is φ = 122300020.

The previous prime is 122300011. The next prime is 122300033. The reversal of 122300021 is 120003221.

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., 117831025 + 4468996 = 10855^2 + 2114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122300021 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 122299975 and 122300011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122300011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61150010 + 61150011.

It is an arithmetic number, because the mean of its divisors is an integer number (61150011).

Almost surely, 2^122300021 is an apocalyptic number.

It is an amenable number.

122300021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122300021 is an equidigital number, since it uses as much as digits as its factorization.

122300021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 122300021 is about 11058.9339902180. The cubic root of 122300021 is about 496.3737928195.

Adding to 122300021 its reverse (120003221), we get a palindrome (242303242).

The spelling of 122300021 in words is "one hundred twenty-two million, three hundred thousand, twenty-one".