21120021120022 has 32 divisors (see below), whose sum is σ = 35404106457888. Its totient is φ = 9365560320000.

The previous prime is 21120021120019. The next prime is 21120021120041. The reversal of 21120021120022 is 22002112002112.

It is a happy number.

It is a super-2 number, since 2×21120021120022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21120021119978 and 21120021120005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28791322 + ... + 29515762.

It is an arithmetic number, because the mean of its divisors is an integer number (1106378326809).

Almost surely, 2^{21120021120022} is an apocalyptic number.

21120021120022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21120021120022 is a deficient number, since it is larger than the sum of its proper divisors (14284085337866).

21120021120022 is a wasteful number, since it uses less digits than its factorization.

21120021120022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756816.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21120021120022 its reverse (22002112002112), we get a palindrome (43122133122134).

The spelling of 21120021120022 in words is "twenty-one trillion, one hundred twenty billion, twenty-one million, one hundred twenty thousand, twenty-two".