2142113021 has 4 divisors (see below), whose sum is σ = 2142253344. Its totient is φ = 2141972700.

The previous prime is 2142113011. The next prime is 2142113047. The reversal of 2142113021 is 1203112412.

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 2142113021 - 2¹⁸ = 2141850877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142113011) 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, 44015 + ... + 78876.

It is an arithmetic number, because the mean of its divisors is an integer number (535563336).

Almost surely, 2^2142113021 is an apocalyptic number.

It is an amenable number.

2142113021 is a deficient number, since it is larger than the sum of its proper divisors (140323).

2142113021 is a wasteful number, since it uses less digits than its factorization.

2142113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140322.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2142113021 is about 46282.9668560692. The cubic root of 2142113021 is about 1289.0827405584.

Adding to 2142113021 its reverse (1203112412), we get a palindrome (3345225433).

The spelling of 2142113021 in words is "two billion, one hundred forty-two million, one hundred thirteen thousand, twenty-one".