21102101012071 has 2 divisors, whose sum is σ = 21102101012072. Its totient is φ = 21102101012070.

The previous prime is 21102101011931. The next prime is 21102101012119. The reversal of 21102101012071 is 17021010120112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102101012071 - 2¹⁷ = 21102100880999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21102101012471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551050506035 + 10551050506036.

It is an arithmetic number, because the mean of its divisors is an integer number (10551050506036).

Almost surely, 2^{21102101012071} is an apocalyptic number.

21102101012071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102101012071 is an equidigital number, since it uses as much as digits as its factorization.

21102101012071 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 21102101012071 its reverse (17021010120112), we get a palindrome (38123111132183).

The spelling of 21102101012071 in words is "twenty-one trillion, one hundred two billion, one hundred one million, twelve thousand, seventy-one".