2142103032221 has 4 divisors (see below), whose sum is σ = 2142109844700. Its totient is φ = 2142096219744.

The previous prime is 2142103032187. The next prime is 2142103032247. The reversal of 2142103032221 is 1222303012412.

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 624621508900 + 1517481523321 = 790330^2 + 1231861^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142103032221 - 2³⁰ = 2141029290397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142103032721) 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, 2910536 + ... + 3571473.

It is an arithmetic number, because the mean of its divisors is an integer number (535527461175).

Almost surely, 2^{2142103032221} is an apocalyptic number.

It is an amenable number.

2142103032221 is a deficient number, since it is larger than the sum of its proper divisors (6812479).

2142103032221 is an equidigital number, since it uses as much as digits as its factorization.

2142103032221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6812478.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 2142103032221 its reverse (1222303012412), we get a palindrome (3364406044633).

The spelling of 2142103032221 in words is "two trillion, one hundred forty-two billion, one hundred three million, thirty-two thousand, two hundred twenty-one".