21211020001027 has 2 divisors, whose sum is σ = 21211020001028. Its totient is φ = 21211020001026.

The previous prime is 21211020001019. The next prime is 21211020001111. The reversal of 21211020001027 is 72010002011212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21211020001027 - 2³ = 21211020001019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21211020000995 and 21211020001013.

It is not a weakly prime, because it can be changed into another prime (21211020005027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605510000513 + 10605510000514.

It is an arithmetic number, because the mean of its divisors is an integer number (10605510000514).

Almost surely, 2^{21211020001027} is an apocalyptic number.

21211020001027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211020001027 is an equidigital number, since it uses as much as digits as its factorization.

21211020001027 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 21211020001027 its reverse (72010002011212), we get a palindrome (93221022012239).

The spelling of 21211020001027 in words is "twenty-one trillion, two hundred eleven billion, twenty million, one thousand, twenty-seven".