21000112200122 has 12 divisors (see below), whose sum is σ = 34624151933658. Its totient is φ = 9545505545400.

The previous prime is 21000112200103. The next prime is 21000112200157. The reversal of 21000112200122 is 22100221100012.

It can be written as a sum of positive squares in only one way, i.e., 19886346466921 + 1113765733201 = 4459411^2 + 1055351^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21000112200097 and 21000112200106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43388661329 + ... + 43388661812.

Almost surely, 2^{21000112200122} is an apocalyptic number.

21000112200122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21000112200122 is a deficient number, since it is larger than the sum of its proper divisors (13624039733536).

21000112200122 is a wasteful number, since it uses less digits than its factorization.

21000112200122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86777323165 (or 86777323154 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21000112200122 its reverse (22100221100012), we get a palindrome (43100333300134).

The spelling of 21000112200122 in words is "twenty-one trillion, one hundred twelve million, two hundred thousand, one hundred twenty-two".