211121110002120 has 32 divisors (see below), whose sum is σ = 633363330006720. Its totient is φ = 56298962667200.

The previous prime is 211121110002041. The next prime is 211121110002139. The reversal of 211121110002120 is 21200011121112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211121110002120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879671291556 + ... + 879671291795.

It is an arithmetic number, because the mean of its divisors is an integer number (19792604062710).

Almost surely, 2^{211121110002120} is an apocalyptic number.

211121110002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121110002120 is an abundant number, since it is smaller than the sum of its proper divisors (422242220004600).

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

211121110002120 is a wasteful number, since it uses less digits than its factorization.

211121110002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759342583365 (or 1759342583361 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211121110002120 its reverse (21200011121112), we get a palindrome (232321121123232).

The spelling of 211121110002120 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred ten million, two thousand, one hundred twenty".