21769026841061 has 2 divisors, whose sum is σ = 21769026841062. Its totient is φ = 21769026841060.

The previous prime is 21769026841027. The next prime is 21769026841151. The reversal of 21769026841061 is 16014862096712.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20080570888225 + 1688455952836 = 4481135^2 + 1299406^2 .

It is a cyclic number.

It is not a de Polignac number, because 21769026841061 - 2¹⁰ = 21769026840037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21769026840994 and 21769026841012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21769026841361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10884513420530 + 10884513420531.

It is an arithmetic number, because the mean of its divisors is an integer number (10884513420531).

Almost surely, 2^{21769026841061} is an apocalyptic number.

It is an amenable number.

21769026841061 is a deficient number, since it is larger than the sum of its proper divisors (1).

21769026841061 is an equidigital number, since it uses as much as digits as its factorization.

21769026841061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 21769026841061 in words is "twenty-one trillion, seven hundred sixty-nine billion, twenty-six million, eight hundred forty-one thousand, sixty-one".