11206220655 has 64 divisors (see below), whose sum is σ = 21904017408. Its totient is φ = 4780554240.

The previous prime is 11206220621. The next prime is 11206220657. The reversal of 11206220655 is 55602260211.

It is not a de Polignac number, because 11206220655 - 2⁶ = 11206220591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11206220657) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42427 + ... + 155603.

It is an arithmetic number, because the mean of its divisors is an integer number (342250272).

Almost surely, 2^11206220655 is an apocalyptic number.

11206220655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11206220655 is a deficient number, since it is larger than the sum of its proper divisors (10697796753).

11206220655 is a wasteful number, since it uses less digits than its factorization.

11206220655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113256.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 11206220655 its reverse (55602260211), we get a palindrome (66808480866).

The spelling of 11206220655 in words is "eleven billion, two hundred six million, two hundred twenty thousand, six hundred fifty-five".