11155122620 has 12 divisors (see below), whose sum is σ = 23425757544. Its totient is φ = 4462049040.

The previous prime is 11155122619. The next prime is 11155122691. The reversal of 11155122620 is 2622155111.

It is a self number, because there is not a number n which added to its sum of digits gives 11155122620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278878046 + ... + 278878085.

It is an arithmetic number, because the mean of its divisors is an integer number (1952146462).

Almost surely, 2^11155122620 is an apocalyptic number.

11155122620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11155122620 is an abundant number, since it is smaller than the sum of its proper divisors (12270634924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11155122620 is a wasteful number, since it uses less digits than its factorization.

11155122620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557756140 (or 557756138 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 11155122620 its reverse (2622155111), we get a palindrome (13777277731).

The spelling of 11155122620 in words is "eleven billion, one hundred fifty-five million, one hundred twenty-two thousand, six hundred twenty".