20210122111200 has 576 divisors, whose sum is σ = 77378775441408. Its totient is φ = 4486399948800.

The previous prime is 20210122111199. The next prime is 20210122111297. The reversal of 20210122111200 is 211122101202.

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 20210122111200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 79791157 + ... + 80044043.

It is an arithmetic number, because the mean of its divisors is an integer number (134338151808).

Almost surely, 2^{20210122111200} is an apocalyptic number.

20210122111200 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 20210122111200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38689387720704).

20210122111200 is an abundant number, since it is smaller than the sum of its proper divisors (57168653330208).

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

20210122111200 is a wasteful number, since it uses less digits than its factorization.

20210122111200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253055 (or 253042 counting only the distinct ones).

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

Adding to 20210122111200 its reverse (211122101202), we get a palindrome (20421244212402).

The spelling of 20210122111200 in words is "twenty trillion, two hundred ten billion, one hundred twenty-two million, one hundred eleven thousand, two hundred".