1221301045 has 8 divisors (see below), whose sum is σ = 1466365824. Its totient is φ = 976504464.

The previous prime is 1221301013. The next prime is 1221301061. The reversal of 1221301045 is 5401031221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221301045 - 2⁵ = 1221301013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56889 + ... + 75358.

It is an arithmetic number, because the mean of its divisors is an integer number (183295728).

Almost surely, 2^1221301045 is an apocalyptic number.

It is an amenable number.

1221301045 is a deficient number, since it is larger than the sum of its proper divisors (245064779).

1221301045 is a wasteful number, since it uses less digits than its factorization.

1221301045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134099.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1221301045 is about 34947.1178353809. The cubic root of 1221301045 is about 1068.9094327089.

Adding to 1221301045 its reverse (5401031221), we get a palindrome (6622332266).

The spelling of 1221301045 in words is "one billion, two hundred twenty-one million, three hundred one thousand, forty-five".