1231103113211 has 4 divisors (see below), whose sum is σ = 1231279571832. Its totient is φ = 1230926654592.

The previous prime is 1231103113183. The next prime is 1231103113277. The reversal of 1231103113211 is 1123113011321.

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 1231103113211 - 2⁶ = 1231103113147 is a prime.

It is a super-2 number, since 2×1231103113211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231103116211) 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, 88218845 + ... + 88232798.

It is an arithmetic number, because the mean of its divisors is an integer number (307819892958).

Almost surely, 2^{1231103113211} is an apocalyptic number.

1231103113211 is a deficient number, since it is larger than the sum of its proper divisors (176458621).

1231103113211 is an equidigital number, since it uses as much as digits as its factorization.

1231103113211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176458620.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1231103113211 its reverse (1123113011321), we get a palindrome (2354216124532).

The spelling of 1231103113211 in words is "one trillion, two hundred thirty-one billion, one hundred three million, one hundred thirteen thousand, two hundred eleven".