20121111122000 has 640 divisors, whose sum is σ = 58261658158080. Its totient is φ = 6575385600000.

The previous prime is 20121111121967. The next prime is 20121111122003. The reversal of 20121111122000 is 22111112102.

It is a super-2 number, since 2×20121111122000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121111122003) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22184245547 + ... + 22184246453.

It is an arithmetic number, because the mean of its divisors is an integer number (91033840872).

Almost surely, 2^{20121111122000} is an apocalyptic number.

20121111122000 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 20121111122000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29130829079040).

20121111122000 is an abundant number, since it is smaller than the sum of its proper divisors (38140547036080).

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

20121111122000 is a wasteful number, since it uses less digits than its factorization.

20121111122000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608 (or 1592 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20121111122000 its reverse (22111112102), we get a palindrome (20143222234102).

The spelling of 20121111122000 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, one hundred twenty-two thousand".