21331322010049 has 2 divisors, whose sum is σ = 21331322010050. Its totient is φ = 21331322010048.

The previous prime is 21331322010001. The next prime is 21331322010071. The reversal of 21331322010049 is 94001022313312.

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., 19909158433024 + 1422163577025 = 4461968^2 + 1192545^2 .

It is a cyclic number.

It is not a de Polignac number, because 21331322010049 - 2²¹ = 21331319912897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21331322010049.

It is not a weakly prime, because it can be changed into another prime (21331322010079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665661005024 + 10665661005025.

It is an arithmetic number, because the mean of its divisors is an integer number (10665661005025).

Almost surely, 2^{21331322010049} is an apocalyptic number.

It is an amenable number.

21331322010049 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331322010049 is an equidigital number, since it uses as much as digits as its factorization.

21331322010049 is an evil number, because the sum of its binary digits is even.

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

The spelling of 21331322010049 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred twenty-two million, ten thousand, forty-nine".