1321212430 has 16 divisors (see below), whose sum is σ = 2378741904. Its totient is φ = 528360640.

The previous prime is 1321212419. The next prime is 1321212457. The reversal of 1321212430 is 342121231.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1321212398 and 1321212407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37809 + ... + 63811.

It is an arithmetic number, because the mean of its divisors is an integer number (148671369).

Almost surely, 2^1321212430 is an apocalyptic number.

1321212430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321212430 is a deficient number, since it is larger than the sum of its proper divisors (1057529474).

1321212430 is a wasteful number, since it uses less digits than its factorization.

1321212430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31091.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1321212430 is about 36348.4859382066. The cubic root of 1321212430 is about 1097.2970634683.

Adding to 1321212430 its reverse (342121231), we get a palindrome (1663333661).

The spelling of 1321212430 in words is "one billion, three hundred twenty-one million, two hundred twelve thousand, four hundred thirty".