21120022211020 has 12 divisors (see below), whose sum is σ = 44352046643184. Its totient is φ = 8448008884400.

The previous prime is 21120022211009. The next prime is 21120022211051. The reversal of 21120022211020 is 2011222002112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21120022210985 and 21120022211003.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528000555256 + ... + 528000555295.

It is an arithmetic number, because the mean of its divisors is an integer number (3696003886932).

Almost surely, 2^{21120022211020} is an apocalyptic number.

21120022211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120022211020 is an abundant number, since it is smaller than the sum of its proper divisors (23232024432164).

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

21120022211020 is a wasteful number, since it uses less digits than its factorization.

21120022211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056001110560 (or 1056001110558 counting only the distinct ones).

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

Adding to 21120022211020 its reverse (2011222002112), we get a palindrome (23131244213132).

The spelling of 21120022211020 in words is "twenty-one trillion, one hundred twenty billion, twenty-two million, two hundred eleven thousand, twenty".