21142033427 has 2 divisors, whose sum is σ = 21142033428. Its totient is φ = 21142033426.

The previous prime is 21142033403. The next prime is 21142033441. The reversal of 21142033427 is 72433024112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21142033427 - 2¹⁰ = 21142032403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21142033427.

It is not a weakly prime, because it can be changed into another prime (21142033487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571016713 + 10571016714.

It is an arithmetic number, because the mean of its divisors is an integer number (10571016714).

Almost surely, 2^21142033427 is an apocalyptic number.

21142033427 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142033427 is an equidigital number, since it uses as much as digits as its factorization.

21142033427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

Adding to 21142033427 its reverse (72433024112), we get a palindrome (93575057539).

The spelling of 21142033427 in words is "twenty-one billion, one hundred forty-two million, thirty-three thousand, four hundred twenty-seven".