1131212202011 has 4 divisors (see below), whose sum is σ = 1140119384832. Its totient is φ = 1122305019192.

The previous prime is 1131212201939. The next prime is 1131212202013. The reversal of 1131212202011 is 1102022121311.

It is a happy number.

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 1131212202011 - 2¹⁴ = 1131212185627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131212202013) 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, 4453591220 + ... + 4453591473.

It is an arithmetic number, because the mean of its divisors is an integer number (285029846208).

Almost surely, 2^{1131212202011} is an apocalyptic number.

1131212202011 is a deficient number, since it is larger than the sum of its proper divisors (8907182821).

1131212202011 is an equidigital number, since it uses as much as digits as its factorization.

1131212202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8907182820.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1131212202011 its reverse (1102022121311), we get a palindrome (2233234323322).

It can be divided in two parts, 113121 and 2202011, that added together give a palindrome (2315132).

The spelling of 1131212202011 in words is "one trillion, one hundred thirty-one billion, two hundred twelve million, two hundred two thousand, eleven".