21000122001122 has 12 divisors (see below), whose sum is σ = 34624168093158. Its totient is φ = 9545510000400.

The previous prime is 21000122001121. The next prime is 21000122001127. The reversal of 21000122001122 is 22110022100012.

It can be written as a sum of positive squares in only one way, i.e., 19866533781721 + 1133588219401 = 4457189^2 + 1064701^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21000122001097 and 21000122001106.

It is not an unprimeable number, because it can be changed into a prime (21000122001121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43388681579 + ... + 43388682062.

Almost surely, 2^{21000122001122} is an apocalyptic number.

21000122001122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21000122001122 is a deficient number, since it is larger than the sum of its proper divisors (13624046092036).

21000122001122 is a wasteful number, since it uses less digits than its factorization.

21000122001122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86777363665 (or 86777363654 counting only the distinct ones).

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

Adding to 21000122001122 its reverse (22110022100012), we get a palindrome (43110144101134).

The spelling of 21000122001122 in words is "twenty-one trillion, one hundred twenty-two million, one thousand, one hundred twenty-two".