122603021 has 2 divisors, whose sum is σ = 122603022. Its totient is φ = 122603020.

The previous prime is 122603017. The next prime is 122603051. The reversal of 122603021 is 120306221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93334921 + 29268100 = 9661^2 + 5410^2 .

It is a cyclic number.

It is not a de Polignac number, because 122603021 - 2² = 122603017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122603051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61301510 + 61301511.

It is an arithmetic number, because the mean of its divisors is an integer number (61301511).

Almost surely, 2^122603021 is an apocalyptic number.

It is an amenable number.

122603021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122603021 is an equidigital number, since it uses as much as digits as its factorization.

122603021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 122603021 is about 11072.6248468915. The cubic root of 122603021 is about 496.7833790746.

Adding to 122603021 its reverse (120306221), we get a palindrome (242909242).

The spelling of 122603021 in words is "one hundred twenty-two million, six hundred three thousand, twenty-one".