11111021102028 has 24 divisors (see below), whose sum is σ = 25992363000240. Its totient is φ = 3694152687040.

The previous prime is 11111021101969. The next prime is 11111021102029. The reversal of 11111021102028 is 82020112011111.

It is a junction number, because it is equal to n+sod(n) for n = 11111021101995 and 11111021102013.

It is not an unprimeable number, because it can be changed into a prime (11111021102029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190121843 + ... + 1190131178.

It is an arithmetic number, because the mean of its divisors is an integer number (1083015125010).

Almost surely, 2^{11111021102028} is an apocalyptic number.

It is an amenable number.

11111021102028 is an abundant number, since it is smaller than the sum of its proper divisors (14881341898212).

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

11111021102028 is a wasteful number, since it uses less digits than its factorization.

11111021102028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380253417 (or 2380253415 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 21.

Adding to 11111021102028 its reverse (82020112011111), we get a palindrome (93131133113139).

The spelling of 11111021102028 in words is "eleven trillion, one hundred eleven billion, twenty-one million, one hundred two thousand, twenty-eight".