11261221064 has 32 divisors (see below), whose sum is σ = 21309281280. Its totient is φ = 5578864704.

The previous prime is 11261221051. The next prime is 11261221079. The reversal of 11261221064 is 46012216211.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 802799 + ... + 816705.

It is an arithmetic number, because the mean of its divisors is an integer number (665915040).

Almost surely, 2^11261221064 is an apocalyptic number.

It is an amenable number.

11261221064 is a deficient number, since it is larger than the sum of its proper divisors (10048060216).

11261221064 is a wasteful number, since it uses less digits than its factorization.

11261221064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14837 (or 14833 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 11261221064 its reverse (46012216211), we get a palindrome (57273437275).

The spelling of 11261221064 in words is "eleven billion, two hundred sixty-one million, two hundred twenty-one thousand, sixty-four".