122120521 has 2 divisors, whose sum is σ = 122120522. Its totient is φ = 122120520.

The previous prime is 122120477. The next prime is 122120539. The reversal of 122120521 is 125021221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116532025 + 5588496 = 10795^2 + 2364^2 .

It is a cyclic number.

It is not a de Polignac number, because 122120521 - 2¹¹ = 122118473 is a prime.

It is a super-2 number, since 2×122120521² = 29826843298622882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122120495 and 122120504.

It is not a weakly prime, because it can be changed into another prime (122190521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060260 + 61060261.

It is an arithmetic number, because the mean of its divisors is an integer number (61060261).

Almost surely, 2^122120521 is an apocalyptic number.

It is an amenable number.

122120521 is a deficient number, since it is larger than the sum of its proper divisors (1).

122120521 is an equidigital number, since it uses as much as digits as its factorization.

122120521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 122120521 is about 11050.8153997793. The cubic root of 122120521 is about 496.1308309596.

Adding to 122120521 its reverse (125021221), we get a palindrome (247141742).

The spelling of 122120521 in words is "one hundred twenty-two million, one hundred twenty thousand, five hundred twenty-one".