2012254021 has 4 divisors (see below), whose sum is σ = 2050221132. Its totient is φ = 1974286912.

The previous prime is 2012254019. The next prime is 2012254067. The reversal of 2012254021 is 1204522102.

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 1659340225 + 352913796 = 40735^2 + 18786^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012254021 - 2¹ = 2012254019 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 2012254021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012254721) 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, 18983476 + ... + 18983581.

It is an arithmetic number, because the mean of its divisors is an integer number (512555283).

Almost surely, 2^2012254021 is an apocalyptic number.

It is an amenable number.

2012254021 is a deficient number, since it is larger than the sum of its proper divisors (37967111).

2012254021 is an equidigital number, since it uses as much as digits as its factorization.

2012254021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37967110.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2012254021 is about 44858.1544537891. The cubic root of 2012254021 is about 1262.4889955712.

Adding to 2012254021 its reverse (1204522102), we get a palindrome (3216776123).

The spelling of 2012254021 in words is "two billion, twelve million, two hundred fifty-four thousand, twenty-one".