1223042121 has 12 divisors (see below), whose sum is σ = 2018990272. Its totient is φ = 698881176.

The previous prime is 1223042113. The next prime is 1223042123. The reversal of 1223042121 is 1212403221.

It is a happy number.

1223042121 is a `hidden beast` number, since 1 + 223 + 0 + 421 + 21 = 666.

It is not a de Polignac number, because 1223042121 - 2³ = 1223042113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223042094 and 1223042103.

It is not an unprimeable number, because it can be changed into a prime (1223042123) 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, 9706621 + ... + 9706746.

Almost surely, 2^1223042121 is an apocalyptic number.

It is an amenable number.

1223042121 is a deficient number, since it is larger than the sum of its proper divisors (795948151).

1223042121 is a wasteful number, since it uses less digits than its factorization.

1223042121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19413380 (or 19413377 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1223042121 is about 34972.0191152870. The cubic root of 1223042121 is about 1069.4171341475.

Adding to 1223042121 its reverse (1212403221), we get a palindrome (2435445342).

The spelling of 1223042121 in words is "one billion, two hundred twenty-three million, forty-two thousand, one hundred twenty-one".