21442553033149 has 2 divisors, whose sum is σ = 21442553033150. Its totient is φ = 21442553033148.

The previous prime is 21442553033141. The next prime is 21442553033173. The reversal of 21442553033149 is 94133035524412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14602471257124 + 6840081776025 = 3821318^2 + 2615355^2 .

It is a cyclic number.

It is not a de Polignac number, because 21442553033149 - 2³ = 21442553033141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21442553033099 and 21442553033108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21442553033141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721276516574 + 10721276516575.

It is an arithmetic number, because the mean of its divisors is an integer number (10721276516575).

Almost surely, 2^{21442553033149} is an apocalyptic number.

It is an amenable number.

21442553033149 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442553033149 is an equidigital number, since it uses as much as digits as its factorization.

21442553033149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 21442553033149 in words is "twenty-one trillion, four hundred forty-two billion, five hundred fifty-three million, thirty-three thousand, one hundred forty-nine".