1215520413011 has 2 divisors, whose sum is σ = 1215520413012. Its totient is φ = 1215520413010.

The previous prime is 1215520412987. The next prime is 1215520413013. The reversal of 1215520413011 is 1103140255121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215520413011 - 2¹⁴ = 1215520396627 is a prime.

It is a super-2 number, since 2×1215520413011² (a number of 25 digits) contains 22 as substring.

Together with 1215520413013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1215520413013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607760206505 + 607760206506.

It is an arithmetic number, because the mean of its divisors is an integer number (607760206506).

Almost surely, 2^{1215520413011} is an apocalyptic number.

1215520413011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215520413011 is an equidigital number, since it uses as much as digits as its factorization.

1215520413011 is an evil number, because the sum of its binary digits is even.

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

Adding to 1215520413011 its reverse (1103140255121), we get a palindrome (2318660668132).

The spelling of 1215520413011 in words is "one trillion, two hundred fifteen billion, five hundred twenty million, four hundred thirteen thousand, eleven".