122222421 has 12 divisors (see below), whose sum is σ = 185835520. Its totient is φ = 77193000.

The previous prime is 122222413. The next prime is 122222447. The reversal of 122222421 is 124222221.

122222421 is a `hidden beast` number, since 1 + 22 + 222 + 421 = 666.

It is not a de Polignac number, because 122222421 - 2³ = 122222413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 122222394 and 122222403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 357205 + ... + 357546.

Almost surely, 2^122222421 is an apocalyptic number.

It is an amenable number.

122222421 is a deficient number, since it is larger than the sum of its proper divisors (63613099).

122222421 is a wasteful number, since it uses less digits than its factorization.

122222421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714776 (or 714773 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 122222421 is about 11055.4249579109. The cubic root of 122222421 is about 496.2687866888.

Adding to 122222421 its reverse (124222221), we get a palindrome (246444642).

The spelling of 122222421 in words is "one hundred twenty-two million, two hundred twenty-two thousand, four hundred twenty-one".