1221140504 has 16 divisors (see below), whose sum is σ = 2291896320. Its totient is φ = 609968160.

The previous prime is 1221140491. The next prime is 1221140509. The reversal of 1221140504 is 4050411221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221140509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66584 + ... + 82919.

It is an arithmetic number, because the mean of its divisors is an integer number (143243520).

Almost surely, 2^1221140504 is an apocalyptic number.

It is an amenable number.

1221140504 is a deficient number, since it is larger than the sum of its proper divisors (1070755816).

1221140504 is a wasteful number, since it uses less digits than its factorization.

1221140504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150530 (or 150526 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1221140504 is about 34944.8208465861. The cubic root of 1221140504 is about 1068.8625943230.

Adding to 1221140504 its reverse (4050411221), we get a palindrome (5271551725).

The spelling of 1221140504 in words is "one billion, two hundred twenty-one million, one hundred forty thousand, five hundred four".