11220001655 has 8 divisors (see below), whose sum is σ = 13587525600. Its totient is φ = 8893652256.

The previous prime is 11220001627. The next prime is 11220001679. The reversal of 11220001655 is 55610002211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11220001655 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11220001655.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10293035 + ... + 10294124.

It is an arithmetic number, because the mean of its divisors is an integer number (1698440700).

Almost surely, 2^11220001655 is an apocalyptic number.

11220001655 is a deficient number, since it is larger than the sum of its proper divisors (2367523945).

11220001655 is a wasteful number, since it uses less digits than its factorization.

11220001655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20587273.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 11220001655 its reverse (55610002211), we get a palindrome (66830003866).

The spelling of 11220001655 in words is "eleven billion, two hundred twenty million, one thousand, six hundred fifty-five".