1221133301 has 8 divisors (see below), whose sum is σ = 1227334680. Its totient is φ = 1214944768.

The previous prime is 1221133279. The next prime is 1221133313. The reversal of 1221133301 is 1033311221.

It can be written as a sum of positive squares in 4 ways, for example, as 340587025 + 880546276 = 18455^2 + 29674^2 .

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 1221133301 - 2²² = 1216938997 is a prime.

It is a super-2 number, since 2×1221133301² = 2982333077622313202, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221133301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221133351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227885 + ... + 233181.

It is an arithmetic number, because the mean of its divisors is an integer number (153416835).

Almost surely, 2^1221133301 is an apocalyptic number.

It is an amenable number.

1221133301 is a deficient number, since it is larger than the sum of its proper divisors (6201379).

1221133301 is an equidigital number, since it uses as much as digits as its factorization.

1221133301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6423.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1221133301 is about 34944.7177839513. The cubic root of 1221133301 is about 1068.8604927269.

Adding to 1221133301 its reverse (1033311221), we get a palindrome (2254444522).

The spelling of 1221133301 in words is "one billion, two hundred twenty-one million, one hundred thirty-three thousand, three hundred one".