21101002112027 has 2 divisors, whose sum is σ = 21101002112028. Its totient is φ = 21101002112026.

The previous prime is 21101002112017. The next prime is 21101002112081. The reversal of 21101002112027 is 72021120010112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21101002112027 - 2⁶ = 21101002111963 is a prime.

It is not a weakly prime, because it can be changed into another prime (21101002112017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550501056013 + 10550501056014.

It is an arithmetic number, because the mean of its divisors is an integer number (10550501056014).

Almost surely, 2^{21101002112027} is an apocalyptic number.

21101002112027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101002112027 is an equidigital number, since it uses as much as digits as its factorization.

21101002112027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 21101002112027 its reverse (72021120010112), we get a palindrome (93122122122139).

The spelling of 21101002112027 in words is "twenty-one trillion, one hundred one billion, two million, one hundred twelve thousand, twenty-seven".