21011201149 has 2 divisors, whose sum is σ = 21011201150. Its totient is φ = 21011201148.

The previous prime is 21011201093. The next prime is 21011201171. The reversal of 21011201149 is 94110211012.

It is an a-pointer prime, because the next prime (21011201171) can be obtained adding 21011201149 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20817295524 + 193905625 = 144282^2 + 13925^2 .

It is a cyclic number.

It is not a de Polignac number, because 21011201149 - 2¹⁷ = 21011070077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011201179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505600574 + 10505600575.

It is an arithmetic number, because the mean of its divisors is an integer number (10505600575).

Almost surely, 2^21011201149 is an apocalyptic number.

It is an amenable number.

21011201149 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011201149 is an equidigital number, since it uses as much as digits as its factorization.

21011201149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 21011201149 in words is "twenty-one billion, eleven million, two hundred one thousand, one hundred forty-nine".