1131031213111 has 4 divisors (see below), whose sum is σ = 1132067906424. Its totient is φ = 1129994519800.

The previous prime is 1131031213097. The next prime is 1131031213163. The reversal of 1131031213111 is 1113121301311.

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 1131031213111 - 2⁵ = 1131031213079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131031213171) 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, 518345020 + ... + 518347201.

It is an arithmetic number, because the mean of its divisors is an integer number (283016976606).

Almost surely, 2^{1131031213111} is an apocalyptic number.

1131031213111 is a deficient number, since it is larger than the sum of its proper divisors (1036693313).

1131031213111 is a wasteful number, since it uses less digits than its factorization.

1131031213111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036693312.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 1131031213111 its reverse (1113121301311), we get a palindrome (2244152514422).

The spelling of 1131031213111 in words is "one trillion, one hundred thirty-one billion, thirty-one million, two hundred thirteen thousand, one hundred eleven".