21111102011122 has 16 divisors (see below), whose sum is σ = 33595270418520. Its totient is φ = 9915118283008.

The previous prime is 21111102011119. The next prime is 21111102011137. The reversal of 21111102011122 is 22111020111112.

It can be written as a sum of positive squares in 4 ways, for example, as 20288817584721 + 822284426401 = 4504311^2 + 906799^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21111102011096 and 21111102011105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 609918613 + ... + 609953224.

Almost surely, 2^{21111102011122} is an apocalyptic number.

21111102011122 is a deficient number, since it is larger than the sum of its proper divisors (12484168407398).

21111102011122 is a wasteful number, since it uses less digits than its factorization.

21111102011122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219872365.

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

Adding to 21111102011122 its reverse (22111020111112), we get a palindrome (43222122122234).

The spelling of 21111102011122 in words is "twenty-one trillion, one hundred eleven billion, one hundred two million, eleven thousand, one hundred twenty-two".