2121011121120 has 48 divisors (see below), whose sum is σ = 6681185033040. Its totient is φ = 565602965504.

The previous prime is 2121011121049. The next prime is 2121011121133. The reversal of 2121011121120 is 211211101212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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 2121011121120.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2209386105 + ... + 2209387064.

It is an arithmetic number, because the mean of its divisors is an integer number (139191354855).

Almost surely, 2^{2121011121120} is an apocalyptic number.

2121011121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121011121120 is an abundant number, since it is smaller than the sum of its proper divisors (4560173911920).

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

2121011121120 is a wasteful number, since it uses less digits than its factorization.

2121011121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4418773187 (or 4418773179 counting only the distinct ones).

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

Adding to 2121011121120 its reverse (211211101212), we get a palindrome (2332222222332).

The spelling of 2121011121120 in words is "two trillion, one hundred twenty-one billion, eleven million, one hundred twenty-one thousand, one hundred twenty".