21110211229 has 2 divisors, whose sum is σ = 21110211230. Its totient is φ = 21110211228.

The previous prime is 21110211217. The next prime is 21110211247. The reversal of 21110211229 is 92211201112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19185020100 + 1925191129 = 138510^2 + 43877^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110211229 - 2²⁷ = 20975993501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110211209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555105614 + 10555105615.

It is an arithmetic number, because the mean of its divisors is an integer number (10555105615).

Almost surely, 2^21110211229 is an apocalyptic number.

It is an amenable number.

21110211229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110211229 is an equidigital number, since it uses as much as digits as its factorization.

21110211229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 21110211229 in words is "twenty-one billion, one hundred ten million, two hundred eleven thousand, two hundred twenty-nine".