11525673221 has 16 divisors (see below), whose sum is σ = 12330517248. Its totient is φ = 10746595200.

The previous prime is 11525673217. The next prime is 11525673223. The reversal of 11525673221 is 12237652511.

It is a cyclic number.

It is not a de Polignac number, because 11525673221 - 2² = 11525673217 is a prime.

It is a super-2 number, since 2×11525673221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11525673223) 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 15 ways as a sum of consecutive naturals, for example, 1284611 + ... + 1293551.

It is an arithmetic number, because the mean of its divisors is an integer number (770657328).

Almost surely, 2^11525673221 is an apocalyptic number.

It is an amenable number.

11525673221 is a deficient number, since it is larger than the sum of its proper divisors (804844027).

11525673221 is a wasteful number, since it uses less digits than its factorization.

11525673221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10372.

The product of its digits is 25200, while the sum is 35.

The spelling of 11525673221 in words is "eleven billion, five hundred twenty-five million, six hundred seventy-three thousand, two hundred twenty-one".