21111001022 has 8 divisors (see below), whose sum is σ = 32263982856. Its totient is φ = 10356340072.

The previous prime is 21111000997. The next prime is 21111001057. The reversal of 21111001022 is 22010011112.

21111001022 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 21111000994 and 21111001012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99580088 + ... + 99580299.

It is an arithmetic number, because the mean of its divisors is an integer number (4032997857).

Almost surely, 2^21111001022 is an apocalyptic number.

21111001022 is a deficient number, since it is larger than the sum of its proper divisors (11152981834).

21111001022 is a wasteful number, since it uses less digits than its factorization.

21111001022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199160442.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21111001022 its reverse (22010011112), we get a palindrome (43121012134).

The spelling of 21111001022 in words is "twenty-one billion, one hundred eleven million, one thousand, twenty-two".