21161260773007 has 8 divisors (see below), whose sum is σ = 22406132000736. Its totient is φ = 19916399676672.

The previous prime is 21161260772983. The next prime is 21161260773053. The reversal of 21161260773007 is 70037706216112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21161260773007 - 2⁷ = 21161260772879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21161260773307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1999083 + ... + 6805795.

It is an arithmetic number, because the mean of its divisors is an integer number (2800766500092).

Almost surely, 2^{21161260773007} is an apocalyptic number.

21161260773007 is a deficient number, since it is larger than the sum of its proper divisors (1244871227729).

21161260773007 is a wasteful number, since it uses less digits than its factorization.

21161260773007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065697.

The product of its (nonzero) digits is 148176, while the sum is 43.

Adding to 21161260773007 its reverse (70037706216112), we get a palindrome (91198966989119).

The spelling of 21161260773007 in words is "twenty-one trillion, one hundred sixty-one billion, two hundred sixty million, seven hundred seventy-three thousand, seven".