2142235521 has 12 divisors (see below), whose sum is σ = 3094745472. Its totient is φ = 1427969976.

The previous prime is 2142235519. The next prime is 2142235531. The reversal of 2142235521 is 1255322412.

It is not a de Polignac number, because 2142235521 - 2¹ = 2142235519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2142235531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111400 + ... + 129206.

It is an arithmetic number, because the mean of its divisors is an integer number (257895456).

Almost surely, 2^2142235521 is an apocalyptic number.

It is an amenable number.

2142235521 is a deficient number, since it is larger than the sum of its proper divisors (952509951).

2142235521 is a wasteful number, since it uses less digits than its factorization.

2142235521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31180 (or 31177 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 2142235521 is about 46284.2902181723. The cubic root of 2142235521 is about 1289.1073128108.

Adding to 2142235521 its reverse (1255322412), we get a palindrome (3397557933).

The spelling of 2142235521 in words is "two billion, one hundred forty-two million, two hundred thirty-five thousand, five hundred twenty-one".