21120220022000 has 160 divisors (see below), whose sum is σ = 55718833569984. Its totient is φ = 7679041536000.

The previous prime is 21120220021991. The next prime is 21120220022017. The reversal of 21120220022000 is 22002202112.

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 31 ways as a sum of consecutive naturals, for example, 173145032 + ... + 173266968.

Almost surely, 2^{21120220022000} is an apocalyptic number.

21120220022000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21120220022000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27859416784992).

21120220022000 is an abundant number, since it is smaller than the sum of its proper divisors (34598613547984).

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

21120220022000 is a wasteful number, since it uses less digits than its factorization.

21120220022000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129844 (or 129828 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21120220022000 its reverse (22002202112), we get a palindrome (21142222224112).

It can be divided in two parts, 211202 and 20022000, that added together give a palindrome (20233202).

The spelling of 21120220022000 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty million, twenty-two thousand".