11221330513531 has 4 divisors (see below), whose sum is σ = 11222960816872. Its totient is φ = 11219700210192.

The previous prime is 11221330513489. The next prime is 11221330513543. The reversal of 11221330513531 is 13531503312211.

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 11221330513531 - 2²⁵ = 11221296959099 is a prime.

It is a super-2 number, since 2×11221330513531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11221330513493 and 11221330513502.

It is not an unprimeable number, because it can be changed into a prime (11221330513831) 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, 815141346 + ... + 815155111.

It is an arithmetic number, because the mean of its divisors is an integer number (2805740204218).

Almost surely, 2^{11221330513531} is an apocalyptic number.

11221330513531 is a deficient number, since it is larger than the sum of its proper divisors (1630303341).

11221330513531 is an equidigital number, since it uses as much as digits as its factorization.

11221330513531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630303340.

The product of its (nonzero) digits is 8100, while the sum is 31.

Adding to 11221330513531 its reverse (13531503312211), we get a palindrome (24752833825742).

The spelling of 11221330513531 in words is "eleven trillion, two hundred twenty-one billion, three hundred thirty million, five hundred thirteen thousand, five hundred thirty-one".