215015126201 has 4 divisors (see below), whose sum is σ = 215152342272. Its totient is φ = 214877910132.

The previous prime is 215015126159. The next prime is 215015126231. The reversal of 215015126201 is 102621510512.

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 a de Polignac number, because none of the positive numbers 2^k-215015126201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (215015126231) 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, 68605685 + ... + 68608818.

It is an arithmetic number, because the mean of its divisors is an integer number (53788085568).

Almost surely, 2^215015126201 is an apocalyptic number.

It is an amenable number.

215015126201 is a deficient number, since it is larger than the sum of its proper divisors (137216071).

215015126201 is a wasteful number, since it uses less digits than its factorization.

215015126201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137216070.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 215015126201 its reverse (102621510512), we get a palindrome (317636636713).

The spelling of 215015126201 in words is "two hundred fifteen billion, fifteen million, one hundred twenty-six thousand, two hundred one".