2131123463111 has 4 divisors (see below), whose sum is σ = 2131131597672. Its totient is φ = 2131115328552.

The previous prime is 2131123463107. The next prime is 2131123463113. The reversal of 2131123463111 is 1113643211312.

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 2131123463111 - 2² = 2131123463107 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 (2131123463113) 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, 3660761 + ... + 4202786.

It is an arithmetic number, because the mean of its divisors is an integer number (532782899418).

Almost surely, 2^{2131123463111} is an apocalyptic number.

2131123463111 is a deficient number, since it is larger than the sum of its proper divisors (8134561).

2131123463111 is an equidigital number, since it uses as much as digits as its factorization.

2131123463111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8134560.

The product of its digits is 2592, while the sum is 29.

Adding to 2131123463111 its reverse (1113643211312), we get a palindrome (3244766674423).

The spelling of 2131123463111 in words is "two trillion, one hundred thirty-one billion, one hundred twenty-three million, four hundred sixty-three thousand, one hundred eleven".