2112021021 has 8 divisors (see below), whose sum is σ = 3072030624. Its totient is φ = 1280012720.

The previous prime is 2112021001. The next prime is 2112021031. The reversal of 2112021021 is 1201202112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2112021021 - 2¹¹ = 2112018973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2112020988 and 2112021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112021001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32000286 + ... + 32000351.

It is an arithmetic number, because the mean of its divisors is an integer number (384003828).

Almost surely, 2^2112021021 is an apocalyptic number.

It is an amenable number.

2112021021 is a deficient number, since it is larger than the sum of its proper divisors (960009603).

2112021021 is a wasteful number, since it uses less digits than its factorization.

2112021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64000651.

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

The square root of 2112021021 is about 45956.7298771355. The cubic root of 2112021021 is about 1283.0179886496.

Adding to 2112021021 its reverse (1201202112), we get a palindrome (3313223133).

The spelling of 2112021021 in words is "two billion, one hundred twelve million, twenty-one thousand, twenty-one".