27321227421 has 16 divisors (see below), whose sum is σ = 37191947904. Its totient is φ = 17833742784.

The previous prime is 27321227407. The next prime is 27321227429. The reversal of 27321227421 is 12472212372.

It is not a de Polignac number, because 27321227421 - 2⁵ = 27321227389 is a prime.

It is a super-2 number, since 2×27321227421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27321227429) 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, 98986 + ... + 253851.

It is an arithmetic number, because the mean of its divisors is an integer number (2324496744).

Almost surely, 2^27321227421 is an apocalyptic number.

It is an amenable number.

27321227421 is a deficient number, since it is larger than the sum of its proper divisors (9870720483).

27321227421 is a wasteful number, since it uses less digits than its factorization.

27321227421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353380.

The product of its digits is 18816, while the sum is 33.

Adding to 27321227421 its reverse (12472212372), we get a palindrome (39793439793).

The spelling of 27321227421 in words is "twenty-seven billion, three hundred twenty-one million, two hundred twenty-seven thousand, four hundred twenty-one".