26221401217 has 8 divisors (see below), whose sum is σ = 28617454080. Its totient is φ = 23827396560.

The previous prime is 26221401187. The next prime is 26221401253. The reversal of 26221401217 is 71210412262.

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

It is not a de Polignac number, because 26221401217 - 2²⁷ = 26087183489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26221401317) 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, 485217 + ... + 536542.

It is an arithmetic number, because the mean of its divisors is an integer number (3577181760).

Almost surely, 2^26221401217 is an apocalyptic number.

It is an amenable number.

26221401217 is a deficient number, since it is larger than the sum of its proper divisors (2396052863).

26221401217 is a wasteful number, since it uses less digits than its factorization.

26221401217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024103.

The product of its (nonzero) digits is 2688, while the sum is 28.

Adding to 26221401217 its reverse (71210412262), we get a palindrome (97431813479).

The spelling of 26221401217 in words is "twenty-six billion, two hundred twenty-one million, four hundred one thousand, two hundred seventeen".