215124011 has 2 divisors, whose sum is σ = 215124012. Its totient is φ = 215124010.

The previous prime is 215123959. The next prime is 215124053. The reversal of 215124011 is 110421512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215124011 - 2¹⁰ = 215122987 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (215126011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107562005 + 107562006.

It is an arithmetic number, because the mean of its divisors is an integer number (107562006).

Almost surely, 2^215124011 is an apocalyptic number.

215124011 is a deficient number, since it is larger than the sum of its proper divisors (1).

215124011 is an equidigital number, since it uses as much as digits as its factorization.

215124011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 215124011 is about 14667.1064290132. The cubic root of 215124011 is about 599.1878001224.

Adding to 215124011 its reverse (110421512), we get a palindrome (325545523).

It can be divided in two parts, 2151 and 24011, that added together give a palindrome (26162).

The spelling of 215124011 in words is "two hundred fifteen million, one hundred twenty-four thousand, eleven".