21011121122 has 16 divisors (see below), whose sum is σ = 32632597440. Its totient is φ = 10134236112.

The previous prime is 21011121073. The next prime is 21011121127. The reversal of 21011121122 is 22112111012.

It is a junction number, because it is equal to n+sod(n) for n = 21011121097 and 21011121106.

It is not an unprimeable number, because it can be changed into a prime (21011121127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96158 + ... + 226425.

It is an arithmetic number, because the mean of its divisors is an integer number (2039537340).

Almost surely, 2^21011121122 is an apocalyptic number.

21011121122 is a deficient number, since it is larger than the sum of its proper divisors (11621476318).

21011121122 is a wasteful number, since it uses less digits than its factorization.

21011121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323737.

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

Adding to 21011121122 its reverse (22112111012), we get a palindrome (43123232134).

The spelling of 21011121122 in words is "twenty-one billion, eleven million, one hundred twenty-one thousand, one hundred twenty-two".