11052201661 has 16 divisors (see below), whose sum is σ = 11851257600. Its totient is φ = 10280020608.

The previous prime is 11052201659. The next prime is 11052201691. The reversal of 11052201661 is 16610225011.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11052201661 - 2¹ = 11052201659 is a prime.

It is a super-2 number, since 2×11052201661² (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 (11052201691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2320000 + ... + 2324758.

It is an arithmetic number, because the mean of its divisors is an integer number (740703600).

Almost surely, 2^11052201661 is an apocalyptic number.

It is an amenable number.

11052201661 is a deficient number, since it is larger than the sum of its proper divisors (799055939).

11052201661 is a wasteful number, since it uses less digits than its factorization.

11052201661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7548.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 11052201661 its reverse (16610225011), we get a palindrome (27662426672).

The spelling of 11052201661 in words is "eleven billion, fifty-two million, two hundred one thousand, six hundred sixty-one".