11001215530 has 16 divisors (see below), whose sum is σ = 20285168904. Its totient is φ = 4293157120.

The previous prime is 11001215501. The next prime is 11001215539. The reversal of 11001215530 is 3551210011.

It can be written as a sum of positive squares in 4 ways, for example, as 2959251201 + 8041964329 = 54399^2 + 89677^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11001215498 and 11001215507.

It is not an unprimeable number, because it can be changed into a prime (11001215539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13415707 + ... + 13416526.

Almost surely, 2^11001215530 is an apocalyptic number.

11001215530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11001215530 is a deficient number, since it is larger than the sum of its proper divisors (9283953374).

11001215530 is a wasteful number, since it uses less digits than its factorization.

11001215530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26832281.

The product of its (nonzero) digits is 150, while the sum is 19.

Adding to 11001215530 its reverse (3551210011), we get a palindrome (14552425541).

The spelling of 11001215530 in words is "eleven billion, one million, two hundred fifteen thousand, five hundred thirty".