215002520123 has 4 divisors (see below), whose sum is σ = 217131258048. Its totient is φ = 212873782200.

The previous prime is 215002520107. The next prime is 215002520191. The reversal of 215002520123 is 321025200512.

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 215002520123 - 2⁴ = 215002520107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215002580123) 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, 1064368811 + ... + 1064369012.

It is an arithmetic number, because the mean of its divisors is an integer number (54282814512).

Almost surely, 2^215002520123 is an apocalyptic number.

215002520123 is a deficient number, since it is larger than the sum of its proper divisors (2128737925).

215002520123 is a wasteful number, since it uses less digits than its factorization.

215002520123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128737924.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 215002520123 its reverse (321025200512), we get a palindrome (536027720635).

The spelling of 215002520123 in words is "two hundred fifteen billion, two million, five hundred twenty thousand, one hundred twenty-three".