21102011011027 has 2 divisors, whose sum is σ = 21102011011028. Its totient is φ = 21102011011026.

The previous prime is 21102011011021. The next prime is 21102011011157. The reversal of 21102011011027 is 72011011020112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21102011011027 - 2²⁷ = 21101876793299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21102011010995 and 21102011011013.

It is not a weakly prime, because it can be changed into another prime (21102011011021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551005505513 + 10551005505514.

It is an arithmetic number, because the mean of its divisors is an integer number (10551005505514).

Almost surely, 2^{21102011011027} is an apocalyptic number.

21102011011027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102011011027 is an equidigital number, since it uses as much as digits as its factorization.

21102011011027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 21102011011027 its reverse (72011011020112), we get a palindrome (93113022031139).

The spelling of 21102011011027 in words is "twenty-one trillion, one hundred two billion, eleven million, eleven thousand, twenty-seven".