2112011021121 has 16 divisors (see below), whose sum is σ = 2822765757504. Its totient is φ = 1404635851584.

The previous prime is 2112011021077. The next prime is 2112011021129. The reversal of 2112011021121 is 1211201102112.

It is a happy number.

It is not a de Polignac number, because 2112011021121 - 2⁷ = 2112011020993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2112011021121.

It is not an unprimeable number, because it can be changed into a prime (2112011021129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1593306 + ... + 2600508.

It is an arithmetic number, because the mean of its divisors is an integer number (176422859844).

Almost surely, 2^{2112011021121} is an apocalyptic number.

It is an amenable number.

2112011021121 is a deficient number, since it is larger than the sum of its proper divisors (710754736383).

2112011021121 is a wasteful number, since it uses less digits than its factorization.

2112011021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008880.

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

Adding to 2112011021121 its reverse (1211201102112), we get a palindrome (3323212123233).

The spelling of 2112011021121 in words is "two trillion, one hundred twelve billion, eleven million, twenty-one thousand, one hundred twenty-one".