1221311032 has 32 divisors (see below), whose sum is σ = 2420640000. Its totient is φ = 576078048.

The previous prime is 1221310997. The next prime is 1221311057. The reversal of 1221311032 is 2301131221.

It is a junction number, because it is equal to n+sod(n) for n = 1221310997 and 1221311015.

It is a congruent number.

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, 19519 + ... + 53137.

It is an arithmetic number, because the mean of its divisors is an integer number (75645000).

Almost surely, 2^1221311032 is an apocalyptic number.

It is an amenable number.

1221311032 is a deficient number, since it is larger than the sum of its proper divisors (1199328968).

1221311032 is a wasteful number, since it uses less digits than its factorization.

1221311032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33883 (or 33879 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1221311032 is about 34947.2607224086. The cubic root of 1221311032 is about 1068.9123463147.

Adding to 1221311032 its reverse (2301131221), we get a palindrome (3522442253).

The spelling of 1221311032 in words is "one billion, two hundred twenty-one million, three hundred eleven thousand, thirty-two".