21011230013149 has 2 divisors, whose sum is σ = 21011230013150. Its totient is φ = 21011230013148.

The previous prime is 21011230013131. The next prime is 21011230013197. The reversal of 21011230013149 is 94131003211012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14644474776100 + 6366755237049 = 3826810^2 + 2523243^2 .

It is a cyclic number.

It is not a de Polignac number, because 21011230013149 - 2²³ = 21011221624541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011230013749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505615006574 + 10505615006575.

It is an arithmetic number, because the mean of its divisors is an integer number (10505615006575).

Almost surely, 2^{21011230013149} is an apocalyptic number.

It is an amenable number.

21011230013149 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011230013149 is an equidigital number, since it uses as much as digits as its factorization.

21011230013149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 21011230013149 in words is "twenty-one trillion, eleven billion, two hundred thirty million, thirteen thousand, one hundred forty-nine".