1272052221 has 8 divisors (see below), whose sum is σ = 1850257824. Its totient is φ = 770940720.

The previous prime is 1272052207. The next prime is 1272052231. The reversal of 1272052221 is 1222502721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1272052221 - 2⁵ = 1272052189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1272052191 and 1272052200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272052231) 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, 19273486 + ... + 19273551.

It is an arithmetic number, because the mean of its divisors is an integer number (231282228).

Almost surely, 2^1272052221 is an apocalyptic number.

1272052221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1272052221 is a deficient number, since it is larger than the sum of its proper divisors (578205603).

1272052221 is a wasteful number, since it uses less digits than its factorization.

1272052221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38547051.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 1272052221 is about 35665.8410948067. The cubic root of 1272052221 is about 1083.5151302216.

Adding to 1272052221 its reverse (1222502721), we get a palindrome (2494554942).

The spelling of 1272052221 in words is "one billion, two hundred seventy-two million, fifty-two thousand, two hundred twenty-one".