21402141149 has 2 divisors, whose sum is σ = 21402141150. Its totient is φ = 21402141148.

The previous prime is 21402141107. The next prime is 21402141157. The reversal of 21402141149 is 94114120412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13951861924 + 7450279225 = 118118^2 + 86315^2 .

It is a cyclic number.

It is not a de Polignac number, because 21402141149 - 2²⁸ = 21133705693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21402141199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10701070574 + 10701070575.

It is an arithmetic number, because the mean of its divisors is an integer number (10701070575).

Almost surely, 2^21402141149 is an apocalyptic number.

It is an amenable number.

21402141149 is a deficient number, since it is larger than the sum of its proper divisors (1).

21402141149 is an equidigital number, since it uses as much as digits as its factorization.

21402141149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 21402141149 in words is "twenty-one billion, four hundred two million, one hundred forty-one thousand, one hundred forty-nine".