21120022121022 has 48 divisors (see below), whose sum is σ = 51530376568320. Its totient is φ = 6193554872400.

The previous prime is 21120022120999. The next prime is 21120022121047. The reversal of 21120022121022 is 22012122002112.

It is a happy number.

21120022121022 is a `hidden beast` number, since 2 + 11 + 200 + 221 + 210 + 22 = 666.

It is a super-2 number, since 2×21120022121022² (a number of 27 digits) contains 22 as substring.

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 = 21120022120986 and 21120022121004.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1720425772 + ... + 1720438047.

It is an arithmetic number, because the mean of its divisors is an integer number (1073549511840).

Almost surely, 2^{21120022121022} is an apocalyptic number.

21120022121022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21120022121022 is an abundant number, since it is smaller than the sum of its proper divisors (30410354447298).

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

21120022121022 is a wasteful number, since it uses less digits than its factorization.

21120022121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3440863869 (or 3440863866 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21120022121022 its reverse (22012122002112), we get a palindrome (43132144123134).

The spelling of 21120022121022 in words is "twenty-one trillion, one hundred twenty billion, twenty-two million, one hundred twenty-one thousand, twenty-two".