215601335123 has 2 divisors, whose sum is σ = 215601335124. Its totient is φ = 215601335122.

The previous prime is 215601335119. The next prime is 215601335161. The reversal of 215601335123 is 321533106512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215601335123 - 2² = 215601335119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215601335123.

It is not a weakly prime, because it can be changed into another prime (215601335023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107800667561 + 107800667562.

It is an arithmetic number, because the mean of its divisors is an integer number (107800667562).

Almost surely, 2^215601335123 is an apocalyptic number.

215601335123 is a deficient number, since it is larger than the sum of its proper divisors (1).

215601335123 is an equidigital number, since it uses as much as digits as its factorization.

215601335123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 215601335123 in words is "two hundred fifteen billion, six hundred one million, three hundred thirty-five thousand, one hundred twenty-three".