1221423122 has 8 divisors (see below), whose sum is σ = 1871116416. Its totient is φ = 597717652.

The previous prime is 1221423109. The next prime is 1221423149. The reversal of 1221423122 is 2213241221.

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

It is a junction number, because it is equal to n+sod(n) for n = 1221423094 and 1221423103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6496838 + ... + 6497025.

It is an arithmetic number, because the mean of its divisors is an integer number (233889552).

Almost surely, 2^1221423122 is an apocalyptic number.

1221423122 is a deficient number, since it is larger than the sum of its proper divisors (649693294).

1221423122 is a wasteful number, since it uses less digits than its factorization.

1221423122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12993912.

The product of its digits is 384, while the sum is 20.

The square root of 1221423122 is about 34948.8643878453. The cubic root of 1221423122 is about 1068.9450463440.

Adding to 1221423122 its reverse (2213241221), we get a palindrome (3434664343).

The spelling of 1221423122 in words is "one billion, two hundred twenty-one million, four hundred twenty-three thousand, one hundred twenty-two".