21361645211101 has 8 divisors (see below), whose sum is σ = 23394761379360. Its totient is φ = 19384230855792.

The previous prime is 21361645211083. The next prime is 21361645211107. The reversal of 21361645211101 is 10111254616312.

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 21361645211101 - 2³¹ = 21359497727453 is a prime.

It is a super-2 number, since 2×21361645211101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21361645211107) 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, 13925452435 + ... + 13925453968.

It is an arithmetic number, because the mean of its divisors is an integer number (2924345172420).

Almost surely, 2^{21361645211101} is an apocalyptic number.

It is an amenable number.

21361645211101 is a deficient number, since it is larger than the sum of its proper divisors (2033116168259).

21361645211101 is a wasteful number, since it uses less digits than its factorization.

21361645211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27850906475.

The product of its (nonzero) digits is 8640, while the sum is 34.

Adding to 21361645211101 its reverse (10111254616312), we get a palindrome (31472899827413).

The spelling of 21361645211101 in words is "twenty-one trillion, three hundred sixty-one billion, six hundred forty-five million, two hundred eleven thousand, one hundred one".