2141242021 has 4 divisors (see below), whose sum is σ = 2267197452. Its totient is φ = 2015286592.

The previous prime is 2141242007. The next prime is 2141242043. The reversal of 2141242021 is 1202421412.

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 863536996 + 1277705025 = 29386^2 + 35745^2 .

It is a cyclic number.

It is not a de Polignac number, because 2141242021 - 2¹⁵ = 2141209253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2141242021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2141242001) 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, 62977690 + ... + 62977723.

It is an arithmetic number, because the mean of its divisors is an integer number (566799363).

Almost surely, 2^2141242021 is an apocalyptic number.

It is an amenable number.

2141242021 is a deficient number, since it is larger than the sum of its proper divisors (125955431).

2141242021 is a wasteful number, since it uses less digits than its factorization.

2141242021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125955430.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 2141242021 is about 46273.5563902322. The cubic root of 2141242021 is about 1288.9079998127.

Adding to 2141242021 its reverse (1202421412), we get a palindrome (3343663433).

The spelling of 2141242021 in words is "two billion, one hundred forty-one million, two hundred forty-two thousand, twenty-one".