1131213312111 has 16 divisors (see below), whose sum is σ = 1511275207680. Its totient is φ = 752647764960.

The previous prime is 1131213312101. The next prime is 1131213312127. The reversal of 1131213312111 is 1112133121311.

It is not a de Polignac number, because 1131213312111 - 2¹³ = 1131213303919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131213312101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4696405 + ... + 4931393.

It is an arithmetic number, because the mean of its divisors is an integer number (94454700480).

Almost surely, 2^{1131213312111} is an apocalyptic number.

1131213312111 is a deficient number, since it is larger than the sum of its proper divisors (380061895569).

1131213312111 is a wasteful number, since it uses less digits than its factorization.

1131213312111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238166.

The product of its digits is 108, while the sum is 21.

Adding to 1131213312111 its reverse (1112133121311), we get a palindrome (2243346433422).

The spelling of 1131213312111 in words is "one trillion, one hundred thirty-one billion, two hundred thirteen million, three hundred twelve thousand, one hundred eleven".