1221030343 has 8 divisors (see below), whose sum is σ = 1342934208. Its totient is φ = 1103123424.

The previous prime is 1221030331. The next prime is 1221030359. The reversal of 1221030343 is 3430301221.

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

It is not a de Polignac number, because 1221030343 - 2¹³ = 1221022151 is a prime.

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 1221030343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221030443) 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, 998596 + ... + 999817.

It is an arithmetic number, because the mean of its divisors is an integer number (167866776).

Almost surely, 2^1221030343 is an apocalyptic number.

1221030343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1221030343 is a deficient number, since it is larger than the sum of its proper divisors (121903865).

1221030343 is a wasteful number, since it uses less digits than its factorization.

1221030343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998473.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1221030343 is about 34943.2445974898. The cubic root of 1221030343 is about 1068.8304520995.

Adding to 1221030343 its reverse (3430301221), we get a palindrome (4651331564).

The spelling of 1221030343 in words is "one billion, two hundred twenty-one million, thirty thousand, three hundred forty-three".