2112023213021 has 32 divisors (see below), whose sum is σ = 2190088977120. Its totient is φ = 2035882368000.

The previous prime is 2112023213009. The next prime is 2112023213023. The reversal of 2112023213021 is 1203123202112.

It can be written as a sum of positive squares in 16 ways, for example, as 548398010521 + 1563625202500 = 740539^2 + 1250450^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112023213021 - 2²² = 2112019018717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112023212984 and 2112023213002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112023213023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260193455 + ... + 260201571.

It is an arithmetic number, because the mean of its divisors is an integer number (68440280535).

Almost surely, 2^{2112023213021} is an apocalyptic number.

It is an amenable number.

2112023213021 is a deficient number, since it is larger than the sum of its proper divisors (78065764099).

2112023213021 is a wasteful number, since it uses less digits than its factorization.

2112023213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8705.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2112023213021 its reverse (1203123202112), we get a palindrome (3315146415133).

The spelling of 2112023213021 in words is "two trillion, one hundred twelve billion, twenty-three million, two hundred thirteen thousand, twenty-one".