1221010332 has 12 divisors (see below), whose sum is σ = 2849024136. Its totient is φ = 407003440.

The previous prime is 1221010309. The next prime is 1221010339. The reversal of 1221010332 is 2330101221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221010339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50875419 + ... + 50875442.

It is an arithmetic number, because the mean of its divisors is an integer number (237418678).

Almost surely, 2^1221010332 is an apocalyptic number.

1221010332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221010332 is an abundant number, since it is smaller than the sum of its proper divisors (1628013804).

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

1221010332 is a wasteful number, since it uses less digits than its factorization.

1221010332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101750868 (or 101750866 counting only the distinct ones).

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

The square root of 1221010332 is about 34942.9582605709. The cubic root of 1221010332 is about 1068.8246131829.

Adding to 1221010332 its reverse (2330101221), we get a palindrome (3551111553).

The spelling of 1221010332 in words is "one billion, two hundred twenty-one million, ten thousand, three hundred thirty-two".