20122111010100 has 432 divisors, whose sum is σ = 66645359424000. Its totient is φ = 4678231219200.

The previous prime is 20122111010083. The next prime is 20122111010101. The reversal of 20122111010100 is 101011122102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122111010101) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 156788157 + ... + 156916443.

Almost surely, 2^{20122111010100} is an apocalyptic number.

20122111010100 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 20122111010100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33322679712000).

20122111010100 is an abundant number, since it is smaller than the sum of its proper divisors (46523248413900).

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

20122111010100 is a wasteful number, since it uses less digits than its factorization.

20122111010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128504 (or 128486 counting only the distinct ones).

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

Adding to 20122111010100 its reverse (101011122102), we get a palindrome (20223122132202).

The spelling of 20122111010100 in words is "twenty trillion, one hundred twenty-two billion, one hundred eleven million, ten thousand, one hundred".