1232221220 has 24 divisors (see below), whose sum is σ = 2601220608. Its totient is φ = 490306400.

The previous prime is 1232221219. The next prime is 1232221247. The reversal of 1232221220 is 221222321.

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, 157466 + ... + 165105.

It is an arithmetic number, because the mean of its divisors is an integer number (108384192).

Almost surely, 2^1232221220 is an apocalyptic number.

1232221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1232221220 is an abundant number, since it is smaller than the sum of its proper divisors (1368999388).

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

1232221220 is a wasteful number, since it uses less digits than its factorization.

1232221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322771 (or 322769 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1232221220 is about 35103.0087029588. The cubic root of 1232221220 is about 1072.0858430273.

Adding to 1232221220 its reverse (221222321), we get a palindrome (1453443541).

The spelling of 1232221220 in words is "one billion, two hundred thirty-two million, two hundred twenty-one thousand, two hundred twenty".