21124002133427 has 2 divisors, whose sum is σ = 21124002133428. Its totient is φ = 21124002133426.

The previous prime is 21124002133397. The next prime is 21124002133433. The reversal of 21124002133427 is 72433120042112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21124002133427 - 2¹⁰ = 21124002132403 is a prime.

It is a super-2 number, since 2×21124002133427² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21124002133393 and 21124002133402.

It is not a weakly prime, because it can be changed into another prime (21124002153427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10562001066713 + 10562001066714.

It is an arithmetic number, because the mean of its divisors is an integer number (10562001066714).

Almost surely, 2^{21124002133427} is an apocalyptic number.

21124002133427 is a deficient number, since it is larger than the sum of its proper divisors (1).

21124002133427 is an equidigital number, since it uses as much as digits as its factorization.

21124002133427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

Adding to 21124002133427 its reverse (72433120042112), we get a palindrome (93557122175539).

The spelling of 21124002133427 in words is "twenty-one trillion, one hundred twenty-four billion, two million, one hundred thirty-three thousand, four hundred twenty-seven".