1221341429 has 8 divisors (see below), whose sum is σ = 1522711488. Its totient is φ = 951694560.

The previous prime is 1221341419. The next prime is 1221341447. The reversal of 1221341429 is 9241431221.

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 1221341429 - 2¹⁶ = 1221275893 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 (1221341419) 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, 7930712 + ... + 7930865.

It is an arithmetic number, because the mean of its divisors is an integer number (190338936).

Almost surely, 2^1221341429 is an apocalyptic number.

It is an amenable number.

1221341429 is a deficient number, since it is larger than the sum of its proper divisors (301370059).

1221341429 is a wasteful number, since it uses less digits than its factorization.

1221341429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15861595.

The product of its digits is 3456, while the sum is 29.

The square root of 1221341429 is about 34947.6956178802. The cubic root of 1221341429 is about 1068.9212142329.

The spelling of 1221341429 in words is "one billion, two hundred twenty-one million, three hundred forty-one thousand, four hundred twenty-nine".