122102521 has 4 divisors (see below), whose sum is σ = 126041344. Its totient is φ = 118163700.

The previous prime is 122102507. The next prime is 122102527. The reversal of 122102521 is 125201221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122102521 - 2¹⁷ = 121971449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122102495 and 122102504.

It is not an unprimeable number, because it can be changed into a prime (122102527) 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, 1969365 + ... + 1969426.

It is an arithmetic number, because the mean of its divisors is an integer number (31510336).

Almost surely, 2^122102521 is an apocalyptic number.

It is an amenable number.

122102521 is a deficient number, since it is larger than the sum of its proper divisors (3938823).

122102521 is an equidigital number, since it uses as much as digits as its factorization.

122102521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938822.

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

The square root of 122102521 is about 11050.0009502262. Note that the first 3 decimals coincide. The cubic root of 122102521 is about 496.1064539652.

Adding to 122102521 its reverse (125201221), we get a palindrome (247303742).

The spelling of 122102521 in words is "one hundred twenty-two million, one hundred two thousand, five hundred twenty-one".