2021222210100 has 144 divisors (see below), whose sum is σ = 6025082786688. Its totient is φ = 522769973760.

The previous prime is 2021222210089. The next prime is 2021222210131. The reversal of 2021222210100 is 10122221202.

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 2021222210100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3231489 + ... + 3805911.

Almost surely, 2^{2021222210100} is an apocalyptic number.

2021222210100 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 2021222210100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3012541393344).

2021222210100 is an abundant number, since it is smaller than the sum of its proper divisors (4003860576588).

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

2021222210100 is a wasteful number, since it uses less digits than its factorization.

2021222210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574794 (or 574787 counting only the distinct ones).

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

Adding to 2021222210100 its reverse (10122221202), we get a palindrome (2031344431302).

It can be divided in two parts, 2021222 and 210100, that added together give a palindrome (2231322).

The spelling of 2021222210100 in words is "two trillion, twenty-one billion, two hundred twenty-two million, two hundred ten thousand, one hundred".