21111003311122 has 8 divisors (see below), whose sum is σ = 32758453413900. Its totient is φ = 10191518839824.

The previous prime is 21111003311087. The next prime is 21111003311129. The reversal of 21111003311122 is 22111330011112.

It can be written as a sum of positive squares in 2 ways, for example, as 18998867195361 + 2112136115761 = 4358769^2 + 1453319^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21111003311122.

It is not an unprimeable number, because it can be changed into a prime (21111003311129) 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, 181991407797 + ... + 181991407912.

Almost surely, 2^{21111003311122} is an apocalyptic number.

21111003311122 is a deficient number, since it is larger than the sum of its proper divisors (11647450102778).

21111003311122 is a wasteful number, since it uses less digits than its factorization.

21111003311122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363982815740.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21111003311122 its reverse (22111330011112), we get a palindrome (43222333322234).

The spelling of 21111003311122 in words is "twenty-one trillion, one hundred eleven billion, three million, three hundred eleven thousand, one hundred twenty-two".