21111120122 has 16 divisors (see below), whose sum is σ = 31833453600. Its totient is φ = 10500021840.

The previous prime is 21111120119. The next prime is 21111120139. The reversal of 21111120122 is 22102111112.

It is a junction number, because it is equal to n+sod(n) for n = 21111120097 and 21111120106.

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, 861029 + ... + 885207.

It is an arithmetic number, because the mean of its divisors is an integer number (1989590850).

Almost surely, 2^21111120122 is an apocalyptic number.

21111120122 is a deficient number, since it is larger than the sum of its proper divisors (10722333478).

21111120122 is a wasteful number, since it uses less digits than its factorization.

21111120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26461.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21111120122 its reverse (22102111112), we get a palindrome (43213231234).

The spelling of 21111120122 in words is "twenty-one billion, one hundred eleven million, one hundred twenty thousand, one hundred twenty-two".