22012100121000 has 256 divisors, whose sum is σ = 75511129374720. Its totient is φ = 5294247840000.

The previous prime is 22012100120993. The next prime is 22012100121001. The reversal of 22012100121000 is 12100121022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22012100121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1564885 + ... + 6817115.

It is an arithmetic number, because the mean of its divisors is an integer number (294965349120).

Almost surely, 2^{22012100121000} is an apocalyptic number.

22012100121000 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 22012100121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37755564687360).

22012100121000 is an abundant number, since it is smaller than the sum of its proper divisors (53499029253720).

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

22012100121000 is a wasteful number, since it uses less digits than its factorization.

22012100121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5252393 (or 5252379 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22012100121000 its reverse (12100121022), we get a palindrome (22024200242022).

The spelling of 22012100121000 in words is "twenty-two trillion, twelve billion, one hundred million, one hundred twenty-one thousand".