1222121104 has 20 divisors (see below), whose sum is σ = 2385147564. Its totient is φ = 606599168.

The previous prime is 1222121099. The next prime is 1222121107. The reversal of 1222121104 is 4011212221.

It can be written as a sum of positive squares in 2 ways, for example, as 382280704 + 839840400 = 19552^2 + 28980^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1222121107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276577 + ... + 280960.

Almost surely, 2^1222121104 is an apocalyptic number.

It is an amenable number.

1222121104 is a deficient number, since it is larger than the sum of its proper divisors (1163026460).

1222121104 is a wasteful number, since it uses less digits than its factorization.

1222121104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557682 (or 557676 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1222121104 is about 34958.8487224622. The cubic root of 1222121104 is about 1069.1486237155.

Adding to 1222121104 its reverse (4011212221), we get a palindrome (5233333325).

The spelling of 1222121104 in words is "one billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred four".