20122220111100 has 36 divisors (see below), whose sum is σ = 58220290188984. Its totient is φ = 5365925362880.

The previous prime is 20122220111099. The next prime is 20122220111107. The reversal of 20122220111100 is 111102222102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20122220111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122220111107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33537033219 + ... + 33537033818.

Almost surely, 2^{20122220111100} is an apocalyptic number.

20122220111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122220111100 is an abundant number, since it is smaller than the sum of its proper divisors (38098070077884).

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

20122220111100 is a wasteful number, since it uses less digits than its factorization.

20122220111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67074067054 (or 67074067047 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20122220111100 its reverse (111102222102), we get a palindrome (20233322333202).

The spelling of 20122220111100 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty million, one hundred eleven thousand, one hundred".