211121203120 has 20 divisors (see below), whose sum is σ = 490856797440. Its totient is φ = 84448481216.

The previous prime is 211121203063. The next prime is 211121203141. The reversal of 211121203120 is 21302121112.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 211121203094 and 211121203103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1319507440 + ... + 1319507599.

It is an arithmetic number, because the mean of its divisors is an integer number (24542839872).

Almost surely, 2^211121203120 is an apocalyptic number.

211121203120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121203120 is an abundant number, since it is smaller than the sum of its proper divisors (279735594320).

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

211121203120 is a wasteful number, since it uses less digits than its factorization.

211121203120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639015052 (or 2639015046 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 211121203120 its reverse (21302121112), we get a palindrome (232423324232).

The spelling of 211121203120 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred three thousand, one hundred twenty".