2112201021 has 16 divisors (see below), whose sum is σ = 3358531584. Its totient is φ = 1154494704.

The previous prime is 2112201011. The next prime is 2112201029. The reversal of 2112201021 is 1201022112.

It is not a de Polignac number, because 2112201021 - 2⁶ = 2112200957 is a prime.

It is a super-2 number, since 2×2112201021² = 8922786306226884882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2112200988 and 2112201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112201029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2186061 + ... + 2187026.

It is an arithmetic number, because the mean of its divisors is an integer number (209908224).

Almost surely, 2^2112201021 is an apocalyptic number.

2112201021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2112201021 is a deficient number, since it is larger than the sum of its proper divisors (1246330563).

2112201021 is a wasteful number, since it uses less digits than its factorization.

2112201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373120.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2112201021 is about 45958.6881992948. The cubic root of 2112201021 is about 1283.0544366260.

Adding to 2112201021 its reverse (1201022112), we get a palindrome (3313223133).

The spelling of 2112201021 in words is "two billion, one hundred twelve million, two hundred one thousand, twenty-one".