1221012332 has 24 divisors (see below), whose sum is σ = 2178681120. Its totient is φ = 598648320.

The previous prime is 1221012319. The next prime is 1221012337. The reversal of 1221012332 is 2332101221.

It is a super-2 number, since 2×1221012332² = 2981742229792156448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221012332.

It is not an unprimeable number, because it can be changed into a prime (1221012337) 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, 27857 + ... + 56727.

It is an arithmetic number, because the mean of its divisors is an integer number (90778380).

Almost surely, 2^1221012332 is an apocalyptic number.

It is an amenable number.

1221012332 is a deficient number, since it is larger than the sum of its proper divisors (957668788).

1221012332 is a wasteful number, since it uses less digits than its factorization.

1221012332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29081 (or 29079 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1221012332 is about 34942.9868786284. The cubic root of 1221012332 is about 1068.8251967564.

Adding to 1221012332 its reverse (2332101221), we get a palindrome (3553113553).

Subtracting 1221012332 from its reverse (2332101221), we obtain a square (1111088889 = 33333²).

It can be divided in two parts, 12210 and 12332, that added together give a palindrome (24542).

The spelling of 1221012332 in words is "one billion, two hundred twenty-one million, twelve thousand, three hundred thirty-two".