2111122110100 has 36 divisors (see below), whose sum is σ = 4594728924604. Its totient is φ = 841943047680.

The previous prime is 2111122110073. The next prime is 2111122110109. The reversal of 2111122110100 is 10112211112.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 42139057284 + 2068983052816 = 205278^2 + 1438396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111122110109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31288587 + ... + 31355986.

Almost surely, 2^{2111122110100} is an apocalyptic number.

2111122110100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111122110100 is an abundant number, since it is smaller than the sum of its proper divisors (2483606814504).

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

2111122110100 is a wasteful number, since it uses less digits than its factorization.

2111122110100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62644924 (or 62644917 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2111122110100 its reverse (10112211112), we get a palindrome (2121234321212).

It can be divided in two parts, 2111122 and 110100, that added together give a palindrome (2221222).

The spelling of 2111122110100 in words is "two trillion, one hundred eleven billion, one hundred twenty-two million, one hundred ten thousand, one hundred".