21122000020111 has 4 divisors (see below), whose sum is σ = 21122039665000. Its totient is φ = 21121960375224.

The previous prime is 21122000020061. The next prime is 21122000020127. The reversal of 21122000020111 is 11102000022112.

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

It is a cyclic number.

It is not a de Polignac number, because 21122000020111 - 2¹⁹ = 21121999495823 is a prime.

It is a super-2 number, since 2×21122000020111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21122000020091 and 21122000020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122070020111) 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, 19012236 + ... + 20092513.

It is an arithmetic number, because the mean of its divisors is an integer number (5280509916250).

Almost surely, 2^{21122000020111} is an apocalyptic number.

21122000020111 is a deficient number, since it is larger than the sum of its proper divisors (39644889).

21122000020111 is an equidigital number, since it uses as much as digits as its factorization.

21122000020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39644888.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21122000020111 its reverse (11102000022112), we get a palindrome (32224000042223).

The spelling of 21122000020111 in words is "twenty-one trillion, one hundred twenty-two billion, twenty thousand, one hundred eleven".