21112143122 has 16 divisors (see below), whose sum is σ = 36650376960. Its totient is φ = 8933528448.

The previous prime is 21112143121. The next prime is 21112143137. The reversal of 21112143122 is 22134121112.

It is a junction number, because it is equal to n+sod(n) for n = 21112143094 and 21112143103.

It is not an unprimeable number, because it can be changed into a prime (21112143121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9543263 + ... + 9545474.

It is an arithmetic number, because the mean of its divisors is an integer number (2290648560).

Almost surely, 2^21112143122 is an apocalyptic number.

21112143122 is a deficient number, since it is larger than the sum of its proper divisors (15538233838).

21112143122 is a wasteful number, since it uses less digits than its factorization.

21112143122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19088825.

The product of its digits is 192, while the sum is 20.

Adding to 21112143122 its reverse (22134121112), we get a palindrome (43246264234).

The spelling of 21112143122 in words is "twenty-one billion, one hundred twelve million, one hundred forty-three thousand, one hundred twenty-two".