122242421 has 16 divisors (see below), whose sum is σ = 144405888. Its totient is φ = 101304000.

The previous prime is 122242411. The next prime is 122242423. The reversal of 122242421 is 124242221.

122242421 = T₁₉₈ + T₁₉₉ + ... + T₉₀₄.

It is not a de Polignac number, because 122242421 - 2¹⁰ = 122241397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 122242393 and 122242402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122242423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28391 + ... + 32411.

It is an arithmetic number, because the mean of its divisors is an integer number (9025368).

Almost surely, 2^122242421 is an apocalyptic number.

It is an amenable number.

122242421 is a deficient number, since it is larger than the sum of its proper divisors (22163467).

122242421 is a wasteful number, since it uses less digits than its factorization.

122242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4172.

The product of its digits is 512, while the sum is 20.

The square root of 122242421 is about 11056.3294542086. The cubic root of 122242421 is about 496.2958543750.

Adding to 122242421 its reverse (124242221), we get a palindrome (246484642).

The spelling of 122242421 in words is "one hundred twenty-two million, two hundred forty-two thousand, four hundred twenty-one".