11121001011 has 24 divisors (see below), whose sum is σ = 16134416480. Its totient is φ = 7381414656.

The previous prime is 11121000991. The next prime is 11121001019. The reversal of 11121001011 is 11010012111.

It is not a de Polignac number, because 11121001011 - 2⁷ = 11121000883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121000984 and 11121001002.

It is not an unprimeable number, because it can be changed into a prime (11121001019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2512146 + ... + 2516568.

Almost surely, 2^11121001011 is an apocalyptic number.

11121001011 is a deficient number, since it is larger than the sum of its proper divisors (5013415469).

11121001011 is a wasteful number, since it uses less digits than its factorization.

11121001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5595 (or 5592 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11121001011 its reverse (11010012111), we get a palindrome (22131013122).

It can be divided in two parts, 1112100 and 1011, that added together give a palindrome (1113111).

The spelling of 11121001011 in words is "eleven billion, one hundred twenty-one million, one thousand, eleven".