21000030111022 has 16 divisors (see below), whose sum is σ = 32516325821952. Its totient is φ = 10161257965560.

The previous prime is 21000030110971. The next prime is 21000030111029. The reversal of 21000030111022 is 22011103000012.

It is a junction number, because it is equal to n+sod(n) for n = 21000030110993 and 21000030111011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000030111029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15444573 + ... + 16749175.

It is an arithmetic number, because the mean of its divisors is an integer number (2032270363872).

Almost surely, 2^{21000030111022} is an apocalyptic number.

21000030111022 is a deficient number, since it is larger than the sum of its proper divisors (11516295710930).

21000030111022 is a wasteful number, since it uses less digits than its factorization.

21000030111022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564263.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21000030111022 its reverse (22011103000012), we get a palindrome (43011133111034).

The spelling of 21000030111022 in words is "twenty-one trillion, thirty million, one hundred eleven thousand, twenty-two".