215030243121 has 16 divisors (see below), whose sum is σ = 287857931328. Its totient is φ = 142778163200.

The previous prime is 215030243119. The next prime is 215030243171. The reversal of 215030243121 is 121342030512.

It is a cyclic number.

It is not a de Polignac number, because 215030243121 - 2¹ = 215030243119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215030243091 and 215030243100.

It is not an unprimeable number, because it can be changed into a prime (215030243171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10267741 + ... + 10288661.

It is an arithmetic number, because the mean of its divisors is an integer number (17991120708).

Almost surely, 2^215030243121 is an apocalyptic number.

It is an amenable number.

215030243121 is a deficient number, since it is larger than the sum of its proper divisors (72827688207).

215030243121 is a wasteful number, since it uses less digits than its factorization.

215030243121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34512.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 215030243121 its reverse (121342030512), we get a palindrome (336372273633).

The spelling of 215030243121 in words is "two hundred fifteen billion, thirty million, two hundred forty-three thousand, one hundred twenty-one".