1121001001011 has 20 divisors (see below), whose sum is σ = 1747389646992. Its totient is φ = 714841216848.

The previous prime is 1121001001007. The next prime is 1121001001013. The reversal of 1121001001011 is 1101001001211.

It is not a de Polignac number, because 1121001001011 - 2² = 1121001001007 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1121001000984 and 1121001001002.

It is not an unprimeable number, because it can be changed into a prime (1121001001013) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 300857236 + ... + 300860961.

Almost surely, 2^{1121001001011} is an apocalyptic number.

1121001001011 is a deficient number, since it is larger than the sum of its proper divisors (626388645981).

1121001001011 is an equidigital number, since it uses as much as digits as its factorization.

1121001001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601718232 (or 601718223 counting only the distinct ones).

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

Adding to 1121001001011 its reverse (1101001001211), we get a palindrome (2222002002222).

It can be divided in two parts, 112100 and 1001011, that added together give a palindrome (1113111).

The spelling of 1121001001011 in words is "one trillion, one hundred twenty-one billion, one million, one thousand, eleven".