21041231342149 has 2 divisors, whose sum is σ = 21041231342150. Its totient is φ = 21041231342148.

The previous prime is 21041231342101. The next prime is 21041231342213. The reversal of 21041231342149 is 94124313214012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19463255711524 + 1577975630625 = 4411718^2 + 1256175^2 .

It is a cyclic number.

It is not a de Polignac number, because 21041231342149 - 2¹⁹ = 21041230817861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21041231345149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10520615671074 + 10520615671075.

It is an arithmetic number, because the mean of its divisors is an integer number (10520615671075).

Almost surely, 2^{21041231342149} is an apocalyptic number.

It is an amenable number.

21041231342149 is a deficient number, since it is larger than the sum of its proper divisors (1).

21041231342149 is an equidigital number, since it uses as much as digits as its factorization.

21041231342149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 21041231342149 in words is "twenty-one trillion, forty-one billion, two hundred thirty-one million, three hundred forty-two thousand, one hundred forty-nine".