20000121222000 has 320 divisors, whose sum is σ = 64714287306240. Its totient is φ = 5314056192000.

The previous prime is 20000121221981. The next prime is 20000121222047. The reversal of 20000121222000 is 22212100002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1928832816 + ... + 1928843184.

It is an arithmetic number, because the mean of its divisors is an integer number (202232147832).

Almost surely, 2^{20000121222000} is an apocalyptic number.

20000121222000 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 20000121222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32357143653120).

20000121222000 is an abundant number, since it is smaller than the sum of its proper divisors (44714166084240).

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

20000121222000 is a wasteful number, since it uses less digits than its factorization.

20000121222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11529 (or 11513 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20000121222000 its reverse (22212100002), we get a palindrome (20022333322002).

The spelling of 20000121222000 in words is "twenty trillion, one hundred twenty-one million, two hundred twenty-two thousand".