1213203432 has 32 divisors (see below), whose sum is σ = 3466296000. Its totient is φ = 346629504.

The previous prime is 1213203427. The next prime is 1213203437. The reversal of 1213203432 is 2343023121.

It is an interprime number because it is at equal distance from previous prime (1213203427) and next prime (1213203437).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1213203399 and 1213203408.

It is not an unprimeable number, because it can be changed into a prime (1213203437) 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, 3610557 + ... + 3610892.

It is an arithmetic number, because the mean of its divisors is an integer number (108321750).

Almost surely, 2^1213203432 is an apocalyptic number.

1213203432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213203432 is an abundant number, since it is smaller than the sum of its proper divisors (2253092568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213203432 is a wasteful number, since it uses less digits than its factorization.

1213203432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7221465 (or 7221461 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1213203432 is about 34831.0699232740. The cubic root of 1213203432 is about 1066.5417894608.

Adding to 1213203432 its reverse (2343023121), we get a palindrome (3556226553).

The spelling of 1213203432 in words is "one billion, two hundred thirteen million, two hundred three thousand, four hundred thirty-two".