27143120421 has 6 divisors (see below), whose sum is σ = 39206729510. Its totient is φ = 18095413608.

The previous prime is 27143120419. The next prime is 27143120449. The reversal of 27143120421 is 12402134172.

27143120421 is a `hidden beast` number, since 2 + 7 + 1 + 431 + 204 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27022428225 + 120692196 = 164385^2 + 10986^2 .

It is not a de Polignac number, because 27143120421 - 2¹ = 27143120419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27143127421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1507951126 + ... + 1507951143.

Almost surely, 2^27143120421 is an apocalyptic number.

It is an amenable number.

27143120421 is a deficient number, since it is larger than the sum of its proper divisors (12063609089).

27143120421 is a wasteful number, since it uses less digits than its factorization.

27143120421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015902275 (or 3015902272 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

Adding to 27143120421 its reverse (12402134172), we get a palindrome (39545254593).

The spelling of 27143120421 in words is "twenty-seven billion, one hundred forty-three million, one hundred twenty thousand, four hundred twenty-one".