2112031123021 has 4 divisors (see below), whose sum is σ = 2128661289472. Its totient is φ = 2095400956572.

The previous prime is 2112031123019. The next prime is 2112031123049. The reversal of 2112031123021 is 1203211302112.

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 2112031123021 - 2¹ = 2112031123019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112031123021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112031123051) 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, 8315083035 + ... + 8315083288.

It is an arithmetic number, because the mean of its divisors is an integer number (532165322368).

Almost surely, 2^{2112031123021} is an apocalyptic number.

It is an amenable number.

2112031123021 is a deficient number, since it is larger than the sum of its proper divisors (16630166451).

2112031123021 is a wasteful number, since it uses less digits than its factorization.

2112031123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16630166450.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2112031123021 its reverse (1203211302112), we get a palindrome (3315242425133).

The spelling of 2112031123021 in words is "two trillion, one hundred twelve billion, thirty-one million, one hundred twenty-three thousand, twenty-one".