211121020011100 has 18 divisors (see below), whose sum is σ = 458132613424304. Its totient is φ = 84448408004400.

The previous prime is 211121020011073. The next prime is 211121020011101. The reversal of 211121020011100 is 1110020121112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121020011101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1055605099956 + ... + 1055605100155.

Almost surely, 2^{211121020011100} is an apocalyptic number.

211121020011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121020011100 is an abundant number, since it is smaller than the sum of its proper divisors (247011593413204).

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

211121020011100 is a wasteful number, since it uses less digits than its factorization.

211121020011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111210200125 (or 2111210200118 counting only the distinct ones).

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

Adding to 211121020011100 its reverse (1110020121112), we get a palindrome (212231040132212).

The spelling of 211121020011100 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty million, eleven thousand, one hundred".