1221124204 has 6 divisors (see below), whose sum is σ = 2136967364. Its totient is φ = 610562100.

The previous prime is 1221124181. The next prime is 1221124213. The reversal of 1221124204 is 4024211221.

It is a super-2 number, since 2×1221124204² = 2982288643189267232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152640522 + ... + 152640529.

Almost surely, 2^1221124204 is an apocalyptic number.

It is an amenable number.

1221124204 is a deficient number, since it is larger than the sum of its proper divisors (915843160).

1221124204 is a wasteful number, since it uses less digits than its factorization.

1221124204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305281055 (or 305281053 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1221124204 is about 34944.5876209750. The cubic root of 1221124204 is about 1068.8578385127.

Adding to 1221124204 its reverse (4024211221), we get a palindrome (5245335425).

The spelling of 1221124204 in words is "one billion, two hundred twenty-one million, one hundred twenty-four thousand, two hundred four".