21120111022000 has 80 divisors (see below), whose sum is σ = 51127883632800. Its totient is φ = 8438208979200.

The previous prime is 21120111021979. The next prime is 21120111022009. The reversal of 21120111022000 is 22011102112.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (21120111022009) 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 15 ways as a sum of consecutive naturals, for example, 4428715 + ... + 7864714.

It is an arithmetic number, because the mean of its divisors is an integer number (639098545410).

Almost surely, 2^{21120111022000} is an apocalyptic number.

21120111022000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120111022000 is an abundant number, since it is smaller than the sum of its proper divisors (30007772610800).

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

21120111022000 is a wasteful number, since it uses less digits than its factorization.

21120111022000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12294311 (or 12294295 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21120111022000 its reverse (22011102112), we get a palindrome (21142122124112).

The spelling of 21120111022000 in words is "twenty-one trillion, one hundred twenty billion, one hundred eleven million, twenty-two thousand".