1221042124 has 24 divisors (see below), whose sum is σ = 2266292448. Its totient is φ = 574400640.

The previous prime is 1221042107. The next prime is 1221042127. The reversal of 1221042124 is 4212401221.

It is not an unprimeable number, because it can be changed into a prime (1221042127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103177 + ... + 114400.

It is an arithmetic number, because the mean of its divisors is an integer number (94428852).

Almost surely, 2^1221042124 is an apocalyptic number.

It is an amenable number.

1221042124 is a deficient number, since it is larger than the sum of its proper divisors (1045250324).

1221042124 is a wasteful number, since it uses less digits than its factorization.

1221042124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217665 (or 217663 counting only the distinct ones).

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

The square root of 1221042124 is about 34943.4131704389. The cubic root of 1221042124 is about 1068.8338895928.

Adding to 1221042124 its reverse (4212401221), we get a palindrome (5433443345).

The spelling of 1221042124 in words is "one billion, two hundred twenty-one million, forty-two thousand, one hundred twenty-four".