21200311229 has 2 divisors, whose sum is σ = 21200311230. Its totient is φ = 21200311228.

The previous prime is 21200311213. The next prime is 21200311241. The reversal of 21200311229 is 92211300212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21151339225 + 48972004 = 145435^2 + 6998^2 .

It is a cyclic number.

It is not a de Polignac number, because 21200311229 - 2⁴ = 21200311213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200314229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600155614 + 10600155615.

It is an arithmetic number, because the mean of its divisors is an integer number (10600155615).

Almost surely, 2^21200311229 is an apocalyptic number.

It is an amenable number.

21200311229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200311229 is an equidigital number, since it uses as much as digits as its factorization.

21200311229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 21200311229 in words is "twenty-one billion, two hundred million, three hundred eleven thousand, two hundred twenty-nine".