1131211113021 has 12 divisors (see below), whose sum is σ = 1782514481280. Its totient is φ = 685582492680.

The previous prime is 1131211113017. The next prime is 1131211113023. The reversal of 1131211113021 is 1203111121311.

It is not a de Polignac number, because 1131211113021 - 2² = 1131211113017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131211112985 and 1131211113003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131211113023) 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, 5713187341 + ... + 5713187538.

It is an arithmetic number, because the mean of its divisors is an integer number (148542873440).

Almost surely, 2^{1131211113021} is an apocalyptic number.

1131211113021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1131211113021 is a deficient number, since it is larger than the sum of its proper divisors (651303368259).

1131211113021 is a wasteful number, since it uses less digits than its factorization.

1131211113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11426374896 (or 11426374893 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 1131211113021 its reverse (1203111121311), we get a palindrome (2334322234332).

The spelling of 1131211113021 in words is "one trillion, one hundred thirty-one billion, two hundred eleven million, one hundred thirteen thousand, twenty-one".