20010122111100 has 288 divisors, whose sum is σ = 63461103229440. Its totient is φ = 4827770496000.

The previous prime is 20010122111059. The next prime is 20010122111113. The reversal of 20010122111100 is 111122101002.

It is a super-2 number, since 2×20010122111100² (a number of 27 digits) contains 22 as substring.

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 95 ways as a sum of consecutive naturals, for example, 2774171094 + ... + 2774178306.

It is an arithmetic number, because the mean of its divisors is an integer number (220351052880).

Almost surely, 2^{20010122111100} is an apocalyptic number.

20010122111100 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 20010122111100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31730551614720).

20010122111100 is an abundant number, since it is smaller than the sum of its proper divisors (43450981118340).

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

20010122111100 is a wasteful number, since it uses less digits than its factorization.

20010122111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11141 (or 11134 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20010122111100 its reverse (111122101002), we get a palindrome (20121244212102).

The spelling of 20010122111100 in words is "twenty trillion, ten billion, one hundred twenty-two million, one hundred eleven thousand, one hundred".