21220100020111 has 2 divisors, whose sum is σ = 21220100020112. Its totient is φ = 21220100020110.

The previous prime is 21220100020081. The next prime is 21220100020121. The reversal of 21220100020111 is 11102000102212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21220100020111 - 2¹⁹ = 21220099495823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21220100020091 and 21220100020100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220100020121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610050010055 + 10610050010056.

It is an arithmetic number, because the mean of its divisors is an integer number (10610050010056).

Almost surely, 2^{21220100020111} is an apocalyptic number.

21220100020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220100020111 is an equidigital number, since it uses as much as digits as its factorization.

21220100020111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21220100020111 its reverse (11102000102212), we get a palindrome (32322100122323).

The spelling of 21220100020111 in words is "twenty-one trillion, two hundred twenty billion, one hundred million, twenty thousand, one hundred eleven".