11345442521 has 32 divisors (see below), whose sum is σ = 13442092032. Its totient is φ = 9375600960.

The previous prime is 11345442487. The next prime is 11345442607. The reversal of 11345442521 is 12524454311.

It is a cyclic number.

It is not a de Polignac number, because 11345442521 - 2¹⁸ = 11345180377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11345442221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6493370 + ... + 6495116.

It is an arithmetic number, because the mean of its divisors is an integer number (420065376).

Almost surely, 2^11345442521 is an apocalyptic number.

It is an amenable number.

11345442521 is a deficient number, since it is larger than the sum of its proper divisors (2096649511).

11345442521 is a wasteful number, since it uses less digits than its factorization.

11345442521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109.

The product of its digits is 19200, while the sum is 32.

Adding to 11345442521 its reverse (12524454311), we get a palindrome (23869896832).

The spelling of 11345442521 in words is "eleven billion, three hundred forty-five million, four hundred forty-two thousand, five hundred twenty-one".