21301020233149 has 2 divisors, whose sum is σ = 21301020233150. Its totient is φ = 21301020233148.

The previous prime is 21301020233147. The next prime is 21301020233231. The reversal of 21301020233149 is 94133202010312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13630236367225 + 7670783865924 = 3691915^2 + 2769618^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301020233149 - 2¹ = 21301020233147 is a prime.

Together with 21301020233147, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21301020233149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21301020233147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650510116574 + 10650510116575.

It is an arithmetic number, because the mean of its divisors is an integer number (10650510116575).

Almost surely, 2^{21301020233149} is an apocalyptic number.

It is an amenable number.

21301020233149 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301020233149 is an equidigital number, since it uses as much as digits as its factorization.

21301020233149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 21301020233149 in words is "twenty-one trillion, three hundred one billion, twenty million, two hundred thirty-three thousand, one hundred forty-nine".