22121204021311 has 4 divisors (see below), whose sum is σ = 22134867521400. Its totient is φ = 22107540521224.

The previous prime is 22121204021281. The next prime is 22121204021327. The reversal of 22121204021311 is 11312040212122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121204021311 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 (22121204021351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6831747616 + ... + 6831750853.

It is an arithmetic number, because the mean of its divisors is an integer number (5533716880350).

Almost surely, 2^{22121204021311} is an apocalyptic number.

22121204021311 is a deficient number, since it is larger than the sum of its proper divisors (13663500089).

22121204021311 is a wasteful number, since it uses less digits than its factorization.

22121204021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13663500088.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 22121204021311 its reverse (11312040212122), we get a palindrome (33433244233433).

The spelling of 22121204021311 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred four million, twenty-one thousand, three hundred eleven".