1131200211031 has 4 divisors (see below), whose sum is σ = 1234036593864. Its totient is φ = 1028363828200.

The previous prime is 1131200210963. The next prime is 1131200211061. The reversal of 1131200211031 is 1301120021311.

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 1131200211031 - 2¹⁷ = 1131200079959 is a prime.

It is a super-2 number, since 2×1131200211031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131200210996 and 1131200211014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131200211061) 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, 51418191400 + ... + 51418191421.

It is an arithmetic number, because the mean of its divisors is an integer number (308509148466).

Almost surely, 2^{1131200211031} is an apocalyptic number.

1131200211031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131200211031 is a deficient number, since it is larger than the sum of its proper divisors (102836382833).

1131200211031 is a wasteful number, since it uses less digits than its factorization.

1131200211031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102836382832.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1131200211031 its reverse (1301120021311), we get a palindrome (2432320232342).

The spelling of 1131200211031 in words is "one trillion, one hundred thirty-one billion, two hundred million, two hundred eleven thousand, thirty-one".