21022101121122 has 48 divisors (see below), whose sum is σ = 45823972273560. Its totient is φ = 6965016576000.

The previous prime is 21022101121103. The next prime is 21022101121127. The reversal of 21022101121122 is 22112110122012.

21022101121122 is a `hidden beast` number, since 210 + 2 + 210 + 1 + 121 + 122 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 18908069452281 + 2114031668841 = 4348341^2 + 1453971^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21022101121095 and 21022101121104.

It is not an unprimeable number, because it can be changed into a prime (21022101121127) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3154047 + ... + 7210562.

Almost surely, 2^{21022101121122} is an apocalyptic number.

21022101121122 is an abundant number, since it is smaller than the sum of its proper divisors (24801871152438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022101121122 is a wasteful number, since it uses less digits than its factorization.

21022101121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10365299 (or 10365296 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21022101121122 its reverse (22112110122012), we get a palindrome (43134211243134).

The spelling of 21022101121122 in words is "twenty-one trillion, twenty-two billion, one hundred one million, one hundred twenty-one thousand, one hundred twenty-two".