1240132221 has 16 divisors (see below), whose sum is σ = 1863112320. Its totient is φ = 815109120.

The previous prime is 1240132217. The next prime is 1240132241. The reversal of 1240132221 is 1222310421.

It is a happy number.

1240132221 is a `hidden beast` number, since 12 + 401 + 32 + 221 = 666.

It is not a de Polignac number, because 1240132221 - 2² = 1240132217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240132194 and 1240132203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240132211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321540 + ... + 325373.

It is an arithmetic number, because the mean of its divisors is an integer number (116444520).

Almost surely, 2^1240132221 is an apocalyptic number.

It is an amenable number.

1240132221 is a deficient number, since it is larger than the sum of its proper divisors (622980099).

1240132221 is an equidigital number, since it uses as much as digits as its factorization.

1240132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646993 (or 646987 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1240132221 is about 35215.5110853158. The cubic root of 1240132221 is about 1074.3752550947.

Adding to 1240132221 its reverse (1222310421), we get a palindrome (2462442642).

The spelling of 1240132221 in words is "one billion, two hundred forty million, one hundred thirty-two thousand, two hundred twenty-one".