21122311310111 has 8 divisors (see below), whose sum is σ = 24255285715200. Its totient is φ = 18191464286040.

The previous prime is 21122311310071. The next prime is 21122311310123. The reversal of 21122311310111 is 11101311322112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122311310111 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 (21122311310141) 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, 50531845031 + ... + 50531845448.

It is an arithmetic number, because the mean of its divisors is an integer number (3031910714400).

Almost surely, 2^{21122311310111} is an apocalyptic number.

21122311310111 is a deficient number, since it is larger than the sum of its proper divisors (3132974405089).

21122311310111 is a wasteful number, since it uses less digits than its factorization.

21122311310111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101063690509.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 21122311310111 its reverse (11101311322112), we get a palindrome (32223622632223).

The spelling of 21122311310111 in words is "twenty-one trillion, one hundred twenty-two billion, three hundred eleven million, three hundred ten thousand, one hundred eleven".