2021222101200 has 120 divisors (see below), whose sum is σ = 6487370421600. Its totient is φ = 537933473280.

The previous prime is 2021222101183. The next prime is 2021222101201. The reversal of 2021222101200 is 21012221202.

It is a tau number, because it is divible by the number of its divisors (120).

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 2021222101200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021222101201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1043770 + ... + 2265369.

It is an arithmetic number, because the mean of its divisors is an integer number (54061420180).

Almost surely, 2^{2021222101200} is an apocalyptic number.

2021222101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021222101200 is an abundant number, since it is smaller than the sum of its proper divisors (4466148320400).

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

2021222101200 is a wasteful number, since it uses less digits than its factorization.

2021222101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309669 (or 3309658 counting only the distinct ones).

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

Adding to 2021222101200 its reverse (21012221202), we get a palindrome (2042234322402).

The spelling of 2021222101200 in words is "two trillion, twenty-one billion, two hundred twenty-two million, one hundred one thousand, two hundred".