21110000212187 has 2 divisors, whose sum is σ = 21110000212188. Its totient is φ = 21110000212186.

The previous prime is 21110000212061. The next prime is 21110000212267. The reversal of 21110000212187 is 78121200001112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110000212187 - 2¹⁸ = 21109999950043 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110000212487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555000106093 + 10555000106094.

It is an arithmetic number, because the mean of its divisors is an integer number (10555000106094).

Almost surely, 2^{21110000212187} is an apocalyptic number.

21110000212187 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110000212187 is an equidigital number, since it uses as much as digits as its factorization.

21110000212187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 26.

Adding to 21110000212187 its reverse (78121200001112), we get a palindrome (99231200213299).

The spelling of 21110000212187 in words is "twenty-one trillion, one hundred ten billion, two hundred twelve thousand, one hundred eighty-seven".