1221049301 has 4 divisors (see below), whose sum is σ = 1221489900. Its totient is φ = 1220608704.

The previous prime is 1221049243. The next prime is 1221049303. The reversal of 1221049301 is 1039401221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1036904401 + 184144900 = 32201^2 + 13570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221049301 - 2³⁰ = 147307477 is a prime.

It is a super-2 number, since 2×1221049301² = 2981922790945177202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221049303) 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, 216116 + ... + 221693.

It is an arithmetic number, because the mean of its divisors is an integer number (305372475).

Almost surely, 2^1221049301 is an apocalyptic number.

It is an amenable number.

1221049301 is a deficient number, since it is larger than the sum of its proper divisors (440599).

1221049301 is an equidigital number, since it uses as much as digits as its factorization.

1221049301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440598.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1221049301 is about 34943.5158648926. The cubic root of 1221049301 is about 1068.8359837072.

The spelling of 1221049301 in words is "one billion, two hundred twenty-one million, forty-nine thousand, three hundred one".