1221002032 has 10 divisors (see below), whose sum is σ = 2365691468. Its totient is φ = 610501008.

The previous prime is 1221002023. The next prime is 1221002039. The reversal of 1221002032 is 2302001221.

It is not an unprimeable number, because it can be changed into a prime (1221002039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38156298 + ... + 38156329.

Almost surely, 2^1221002032 is an apocalyptic number.

It is an amenable number.

1221002032 is a deficient number, since it is larger than the sum of its proper divisors (1144689436).

1221002032 is an equidigital number, since it uses as much as digits as its factorization.

1221002032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76312635 (or 76312629 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1221002032 is about 34942.8394953816. The cubic root of 1221002032 is about 1068.8221913457.

Adding to 1221002032 its reverse (2302001221), we get a palindrome (3523003253).

The spelling of 1221002032 in words is "one billion, two hundred twenty-one million, two thousand, thirty-two".