2211222121100 has 36 divisors (see below), whose sum is σ = 4843196437464. Its totient is φ = 876222593280.

The previous prime is 2211222121081. The next prime is 2211222121117. The reversal of 2211222121100 is 11212221122.

It is a super-3 number, since 3×2211222121100³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103317437 + ... + 103338836.

It is an arithmetic number, because the mean of its divisors is an integer number (134533234374).

Almost surely, 2^{2211222121100} is an apocalyptic number.

2211222121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211222121100 is an abundant number, since it is smaller than the sum of its proper divisors (2631974316364).

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

2211222121100 is a wasteful number, since it uses less digits than its factorization.

2211222121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206656394 (or 206656387 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2211222121100 its reverse (11212221122), we get a palindrome (2222434342222).

The spelling of 2211222121100 in words is "two trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred".