1221032232 has 192 divisors, whose sum is σ = 3995671680. Its totient is φ = 342081792.

The previous prime is 1221032231. The next prime is 1221032233. The reversal of 1221032232 is 2322301221.

It is an interprime number because it is at equal distance from previous prime (1221032231) and next prime (1221032233).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1221032231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 720378 + ... + 722070.

It is an arithmetic number, because the mean of its divisors is an integer number (20810790).

Almost surely, 2^1221032232 is an apocalyptic number.

1221032232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221032232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1997835840).

1221032232 is an abundant number, since it is smaller than the sum of its proper divisors (2774639448).

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

1221032232 is a wasteful number, since it uses less digits than its factorization.

1221032232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774 (or 1758 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1221032232 is about 34943.2716270243. The cubic root of 1221032232 is about 1068.8310032787.

Adding to 1221032232 its reverse (2322301221), we get a palindrome (3543333453).

The spelling of 1221032232 in words is "one billion, two hundred twenty-one million, thirty-two thousand, two hundred thirty-two".