1131201021011 has 4 divisors (see below), whose sum is σ = 1170207952800. Its totient is φ = 1092194089224.

The previous prime is 1131201020921. The next prime is 1131201021019. The reversal of 1131201021011 is 1101201021311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131201021011 - 2¹⁸ = 1131200758867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131201021019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19503465851 + ... + 19503465908.

It is an arithmetic number, because the mean of its divisors is an integer number (292551988200).

Almost surely, 2^{1131201021011} is an apocalyptic number.

1131201021011 is a deficient number, since it is larger than the sum of its proper divisors (39006931789).

1131201021011 is an equidigital number, since it uses as much as digits as its factorization.

1131201021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39006931788.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1131201021011 its reverse (1101201021311), we get a palindrome (2232402042322).

The spelling of 1131201021011 in words is "one trillion, one hundred thirty-one billion, two hundred one million, twenty-one thousand, eleven".