1321210032 has 40 divisors (see below), whose sum is σ = 3461207040. Its totient is φ = 434199360.

The previous prime is 1321210021. The next prime is 1321210057. The reversal of 1321210032 is 2300121231.

It is a junction number, because it is equal to n+sod(n) for n = 1321209993 and 1321210020.

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, 190432 + ... + 197247.

It is an arithmetic number, because the mean of its divisors is an integer number (86530176).

Almost surely, 2^1321210032 is an apocalyptic number.

1321210032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321210032 is an abundant number, since it is smaller than the sum of its proper divisors (2139997008).

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

1321210032 is a wasteful number, since it uses less digits than its factorization.

1321210032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387761 (or 387755 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1321210032 is about 36348.4529519483. The cubic root of 1321210032 is about 1097.2963996033.

Adding to 1321210032 its reverse (2300121231), we get a palindrome (3621331263).

The spelling of 1321210032 in words is "one billion, three hundred twenty-one million, two hundred ten thousand, thirty-two".