21111110020122 has 256 divisors, whose sum is σ = 44816615940096. Its totient is φ = 6623721216000.

The previous prime is 21111110020109. The next prime is 21111110020193. The reversal of 21111110020122 is 22102001111112.

It is a happy number.

It is a super-3 number, since 3×21111110020122³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 77900774847 + ... + 77900775117.

It is an arithmetic number, because the mean of its divisors is an integer number (175064906016).

Almost surely, 2^{21111110020122} is an apocalyptic number.

21111110020122 is an abundant number, since it is smaller than the sum of its proper divisors (23705505919974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21111110020122 is a wasteful number, since it uses less digits than its factorization.

21111110020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21111110020122 its reverse (22102001111112), we get a palindrome (43213111131234).

The spelling of 21111110020122 in words is "twenty-one trillion, one hundred eleven billion, one hundred ten million, twenty thousand, one hundred twenty-two".