11201428861 has 16 divisors (see below), whose sum is σ = 13068496000. Its totient is φ = 9597105504.

The previous prime is 11201428837. The next prime is 11201428897. The reversal of 11201428861 is 16882410211.

It is a happy number.

It is not a de Polignac number, because 11201428861 - 2²⁵ = 11167874429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201428561) 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, 1007350 + ... + 1018408.

It is an arithmetic number, because the mean of its divisors is an integer number (816781000).

Almost surely, 2^11201428861 is an apocalyptic number.

It is an amenable number.

11201428861 is a deficient number, since it is larger than the sum of its proper divisors (1867067139).

11201428861 is an equidigital number, since it uses as much as digits as its factorization.

11201428861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14033 (or 14019 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The spelling of 11201428861 in words is "eleven billion, two hundred one million, four hundred twenty-eight thousand, eight hundred sixty-one".