1221142332 has 24 divisors (see below), whose sum is σ = 2851408000. Its totient is φ = 406750896.

The previous prime is 1221142327. The next prime is 1221142333. The reversal of 1221142332 is 2332411221.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1221142299 and 1221142308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221142333) 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, 19582 + ... + 53157.

Almost surely, 2^1221142332 is an apocalyptic number.

1221142332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221142332 is an abundant number, since it is smaller than the sum of its proper divisors (1630265668).

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

1221142332 is a wasteful number, since it uses less digits than its factorization.

1221142332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74145 (or 74143 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 1221142332 is about 34944.8470020975. The cubic root of 1221142332 is about 1068.8631276713.

Adding to 1221142332 its reverse (2332411221), we get a palindrome (3553553553).

The spelling of 1221142332 in words is "one billion, two hundred twenty-one million, one hundred forty-two thousand, three hundred thirty-two".