1221434302 has 8 divisors (see below), whose sum is σ = 1998710712. Its totient is φ = 555197400.

The previous prime is 1221434273. The next prime is 1221434303. The reversal of 1221434302 is 2034341221.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 55519741 = 1221434302 / (1 + 2 + 2 + 1 + 4 + 3 + 4 + 3 + 0 + 2).

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, 27759849 + ... + 27759892.

It is an arithmetic number, because the mean of its divisors is an integer number (249838839).

Almost surely, 2^1221434302 is an apocalyptic number.

1221434302 is a deficient number, since it is larger than the sum of its proper divisors (777276410).

1221434302 is a wasteful number, since it uses less digits than its factorization.

1221434302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55519754.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1221434302 is about 34949.0243354518. The cubic root of 1221434302 is about 1068.9483077770.

Adding to 1221434302 its reverse (2034341221), we get a palindrome (3255775523).

The spelling of 1221434302 in words is "one billion, two hundred twenty-one million, four hundred thirty-four thousand, three hundred two".