211121212200120 has 96 divisors (see below), whose sum is σ = 711556678188720. Its totient is φ = 56298989917440.

The previous prime is 211121212200113. The next prime is 211121212200121. The reversal of 211121212200120 is 21002212121112.

211121212200120 is a `hidden beast` number, since 2 + 11 + 121 + 212 + 200 + 120 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211121212200093 and 211121212200102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121212200121) 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, 10860134941 + ... + 10860154380.

Almost surely, 2^{211121212200120} is an apocalyptic number.

211121212200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121212200120 is an abundant number, since it is smaller than the sum of its proper divisors (500435465988600).

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

211121212200120 is a wasteful number, since it uses less digits than its factorization.

211121212200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21720289347 (or 21720289331 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211121212200120 its reverse (21002212121112), we get a palindrome (232123424321232).

The spelling of 211121212200120 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twelve million, two hundred thousand, one hundred twenty".