21120001020127 has 2 divisors, whose sum is σ = 21120001020128. Its totient is φ = 21120001020126.

The previous prime is 21120001020089. The next prime is 21120001020149. The reversal of 21120001020127 is 72102010002112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21120001020127 - 2¹¹ = 21120001018079 is a prime.

It is a super-2 number, since 2×21120001020127² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120001020187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560000510063 + 10560000510064.

It is an arithmetic number, because the mean of its divisors is an integer number (10560000510064).

Almost surely, 2^{21120001020127} is an apocalyptic number.

21120001020127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120001020127 is an equidigital number, since it uses as much as digits as its factorization.

21120001020127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 21120001020127 its reverse (72102010002112), we get a palindrome (93222011022239).

The spelling of 21120001020127 in words is "twenty-one trillion, one hundred twenty billion, one million, twenty thousand, one hundred twenty-seven".