2112021121 has 4 divisors (see below), whose sum is σ = 2413738432. Its totient is φ = 1810303812.

The previous prime is 2112021073. The next prime is 2112021127. The reversal of 2112021121 is 1211202112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2112021121 - 2¹⁹ = 2111496833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2112021127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150858645 + ... + 150858658.

It is an arithmetic number, because the mean of its divisors is an integer number (603434608).

Almost surely, 2^2112021121 is an apocalyptic number.

It is an amenable number.

2112021121 is a deficient number, since it is larger than the sum of its proper divisors (301717311).

2112021121 is an equidigital number, since it uses as much as digits as its factorization.

2112021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301717310.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2112021121 is about 45956.7309651154. The cubic root of 2112021121 is about 1283.0180088990.

Adding to 2112021121 its reverse (1211202112), we get a palindrome (3323223233).

The spelling of 2112021121 in words is "two billion, one hundred twelve million, twenty-one thousand, one hundred twenty-one".