2211222012100 has 72 divisors (see below), whose sum is σ = 5225065574400. Its totient is φ = 809042371200.

The previous prime is 2211222012079. The next prime is 2211222012101. The reversal of 2211222012100 is 12102221122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2211222012101) 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, 20010436 + ... + 20120635.

It is an arithmetic number, because the mean of its divisors is an integer number (72570355200).

Almost surely, 2^{2211222012100} is an apocalyptic number.

2211222012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211222012100 is an abundant number, since it is smaller than the sum of its proper divisors (3013843562300).

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

2211222012100 is a wasteful number, since it uses less digits than its factorization.

2211222012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40131133 (or 40131126 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2211222012100 its reverse (12102221122), we get a palindrome (2223324233222).

The spelling of 2211222012100 in words is "two trillion, two hundred eleven billion, two hundred twenty-two million, twelve thousand, one hundred".