21211021000229 has 2 divisors, whose sum is σ = 21211021000230. Its totient is φ = 21211021000228.

The previous prime is 21211021000199. The next prime is 21211021000277. The reversal of 21211021000229 is 92200012011212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14794562176900 + 6416458823329 = 3846370^2 + 2533073^2 .

It is a cyclic number.

It is not a de Polignac number, because 21211021000229 - 2¹² = 21211020996133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211021050229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605510500114 + 10605510500115.

It is an arithmetic number, because the mean of its divisors is an integer number (10605510500115).

Almost surely, 2^{21211021000229} is an apocalyptic number.

It is an amenable number.

21211021000229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211021000229 is an equidigital number, since it uses as much as digits as its factorization.

21211021000229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 21211021000229 in words is "twenty-one trillion, two hundred eleven billion, twenty-one million, two hundred twenty-nine", and thus it is an aban number.