1221434301 has 4 divisors (see below), whose sum is σ = 1628579072. Its totient is φ = 814289532.

The previous prime is 1221434273. The next prime is 1221434303. The reversal of 1221434301 is 1034341221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1221434301 - 2¹⁰ = 1221433277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221434303) 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, 203572381 + ... + 203572386.

It is an arithmetic number, because the mean of its divisors is an integer number (407144768).

Almost surely, 2^1221434301 is an apocalyptic number.

It is an amenable number.

1221434301 is a deficient number, since it is larger than the sum of its proper divisors (407144771).

1221434301 is an equidigital number, since it uses as much as digits as its factorization.

1221434301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407144770.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1221434301 is about 34949.0243211452. The cubic root of 1221434301 is about 1068.9483074853.

Adding to 1221434301 its reverse (1034341221), we get a palindrome (2255775522).

The spelling of 1221434301 in words is "one billion, two hundred twenty-one million, four hundred thirty-four thousand, three hundred one".