20210122012200 has 192 divisors, whose sum is σ = 66340807220160. Its totient is φ = 5072034385920.

The previous prime is 20210122012159. The next prime is 20210122012207. The reversal of 20210122012200 is 221022101202.

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 20210122012200.

It is not an unprimeable number, because it can be changed into a prime (20210122012207) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 198920614 + ... + 199022186.

It is an arithmetic number, because the mean of its divisors is an integer number (345525037605).

Almost surely, 2^{20210122012200} is an apocalyptic number.

20210122012200 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 20210122012200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33170403610080).

20210122012200 is an abundant number, since it is smaller than the sum of its proper divisors (46130685207960).

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

20210122012200 is a wasteful number, since it uses less digits than its factorization.

20210122012200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121116 (or 121107 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20210122012200 its reverse (221022101202), we get a palindrome (20431144113402).

The spelling of 20210122012200 in words is "twenty trillion, two hundred ten billion, one hundred twenty-two million, twelve thousand, two hundred".