122221421 has 8 divisors (see below), whose sum is σ = 139749504. Its totient is φ = 104710320.

The previous prime is 122221417. The next prime is 122221423. The reversal of 122221421 is 124122221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122221421 - 2² = 122221417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122221421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22091 + ... + 27063.

It is an arithmetic number, because the mean of its divisors is an integer number (17468688).

Almost surely, 2^122221421 is an apocalyptic number.

It is an amenable number.

122221421 is a deficient number, since it is larger than the sum of its proper divisors (17528083).

122221421 is an equidigital number, since it uses as much as digits as its factorization.

122221421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8491.

The product of its digits is 128, while the sum is 17.

The square root of 122221421 is about 11055.3797311535. The cubic root of 122221421 is about 496.2674332270.

Adding to 122221421 its reverse (124122221), we get a palindrome (246343642).

The spelling of 122221421 in words is "one hundred twenty-two million, two hundred twenty-one thousand, four hundred twenty-one".