2151352250021 has 4 divisors (see below), whose sum is σ = 2316840884652. Its totient is φ = 1985863615392.

The previous prime is 2151352249957. The next prime is 2151352250039. The reversal of 2151352250021 is 1200522531512.

It is a happy number.

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 1401891520225 + 749460729796 = 1184015^2 + 865714^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151352250021 - 2⁶ = 2151352249957 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 (2151352250321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82744317296 + ... + 82744317321.

It is an arithmetic number, because the mean of its divisors is an integer number (579210221163).

Almost surely, 2^{2151352250021} is an apocalyptic number.

It is an amenable number.

2151352250021 is a deficient number, since it is larger than the sum of its proper divisors (165488634631).

2151352250021 is a wasteful number, since it uses less digits than its factorization.

2151352250021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165488634630.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 2151352250021 its reverse (1200522531512), we get a palindrome (3351874781533).

The spelling of 2151352250021 in words is "two trillion, one hundred fifty-one billion, three hundred fifty-two million, two hundred fifty thousand, twenty-one".