215221412040203 has 4 divisors (see below), whose sum is σ = 215735066961960. Its totient is φ = 214707757118448.

The previous prime is 215221412040149. The next prime is 215221412040233. The reversal of 215221412040203 is 302040214122512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215221412040203 - 2²⁰ = 215221410991627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215221412040233) 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, 256827460250 + ... + 256827461087.

It is an arithmetic number, because the mean of its divisors is an integer number (53933766740490).

Almost surely, 2^{215221412040203} is an apocalyptic number.

215221412040203 is a deficient number, since it is larger than the sum of its proper divisors (513654921757).

215221412040203 is an equidigital number, since it uses as much as digits as its factorization.

215221412040203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513654921756.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 215221412040203 its reverse (302040214122512), we get a palindrome (517261626162715).

The spelling of 215221412040203 in words is "two hundred fifteen trillion, two hundred twenty-one billion, four hundred twelve million, forty thousand, two hundred three".