1213421332 has 24 divisors (see below), whose sum is σ = 2146576320. Its totient is φ = 600149760.

The previous prime is 1213421329. The next prime is 1213421357. The reversal of 1213421332 is 2331243121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136644 + ... + 145252.

It is an arithmetic number, because the mean of its divisors is an integer number (89440680).

Almost surely, 2^1213421332 is an apocalyptic number.

It is an amenable number.

1213421332 is a deficient number, since it is larger than the sum of its proper divisors (933154988).

1213421332 is a wasteful number, since it uses less digits than its factorization.

1213421332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8991 (or 8989 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 1213421332 is about 34834.1977372811. The cubic root of 1213421332 is about 1066.6056384789.

Adding to 1213421332 its reverse (2331243121), we get a palindrome (3544664453).

The spelling of 1213421332 in words is "one billion, two hundred thirteen million, four hundred twenty-one thousand, three hundred thirty-two".