1201001011011 has 12 divisors (see below), whose sum is σ = 1734858949720. Its totient is φ = 800630550720.

The previous prime is 1201001010973. The next prime is 1201001011031. The reversal of 1201001011011 is 1101101001021.

It is not a de Polignac number, because 1201001011011 - 2⁹ = 1201001010499 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 = 1201001010984 and 1201001011002.

It is not an unprimeable number, because it can be changed into a prime (1201001011031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2858341 + ... + 3251478.

Almost surely, 2^{1201001011011} is an apocalyptic number.

1201001011011 is a deficient number, since it is larger than the sum of its proper divisors (533857938709).

1201001011011 is a wasteful number, since it uses less digits than its factorization.

1201001011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6131666 (or 6131663 counting only the distinct ones).

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

Adding to 1201001011011 its reverse (1101101001021), we get a palindrome (2302102012032).

The spelling of 1201001011011 in words is "one trillion, two hundred one billion, one million, eleven thousand, eleven".