122221404 has 18 divisors (see below), whose sum is σ = 308948640. Its totient is φ = 40740456.

The previous prime is 122221387. The next prime is 122221409. The reversal of 122221404 is 404122221.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1697484 + ... + 1697555.

Almost surely, 2^122221404 is an apocalyptic number.

It is an amenable number.

122221404 is an abundant number, since it is smaller than the sum of its proper divisors (186727236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122221404 is a wasteful number, since it uses less digits than its factorization.

122221404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395049 (or 3395044 counting only the distinct ones).

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

The square root of 122221404 is about 11055.3789622970. The cubic root of 122221404 is about 496.2674102181.

Adding to 122221404 its reverse (404122221), we get a palindrome (526343625).

The spelling of 122221404 in words is "one hundred twenty-two million, two hundred twenty-one thousand, four hundred four".