2112021321401 has 4 divisors (see below), whose sum is σ = 2112027937572. Its totient is φ = 2112014705232.

The previous prime is 2112021321367. The next prime is 2112021321407. The reversal of 2112021321401 is 1041231202112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 396906300025 + 1715115021376 = 630005^2 + 1309624^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112021321401 - 2⁶ = 2112021321337 is a prime.

It is a super-2 number, since 2×2112021321401² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2112021321407) 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, 2803610 + ... + 3476243.

It is an arithmetic number, because the mean of its divisors is an integer number (528006984393).

Almost surely, 2^{2112021321401} is an apocalyptic number.

It is an amenable number.

2112021321401 is a deficient number, since it is larger than the sum of its proper divisors (6616171).

2112021321401 is an equidigital number, since it uses as much as digits as its factorization.

2112021321401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6616170.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2112021321401 its reverse (1041231202112), we get a palindrome (3153252523513).

The spelling of 2112021321401 in words is "two trillion, one hundred twelve billion, twenty-one million, three hundred twenty-one thousand, four hundred one".