11001001121001 has 16 divisors (see below), whose sum is σ = 16447300355200. Its totient is φ = 7266716334864.

The previous prime is 11001001120997. The next prime is 11001001121029. The reversal of 11001001121001 is 10012110010011.

It is not a de Polignac number, because 11001001121001 - 2² = 11001001120997 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 not an unprimeable number, because it can be changed into a prime (11001001125001) 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, 1869008461 + ... + 1869014346.

It is an arithmetic number, because the mean of its divisors is an integer number (1027956272200).

Almost surely, 2^{11001001121001} is an apocalyptic number.

It is an amenable number.

11001001121001 is a deficient number, since it is larger than the sum of its proper divisors (5446299234199).

11001001121001 is a wasteful number, since it uses less digits than its factorization.

11001001121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3738022925 (or 3738022919 counting only the distinct ones).

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

Adding to 11001001121001 its reverse (10012110010011), we get a palindrome (21013111131012).

The spelling of 11001001121001 in words is "eleven trillion, one billion, one million, one hundred twenty-one thousand, one".