1231478210911 has 12 divisors (see below), whose sum is σ = 1333530838080. Its totient is φ = 1136717849280.

The previous prime is 1231478210881. The next prime is 1231478210933. The reversal of 1231478210911 is 1190128741321.

It is not a de Polignac number, because 1231478210911 - 2¹⁵ = 1231478178143 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 (1231478210981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7986795 + ... + 8139523.

It is an arithmetic number, because the mean of its divisors is an integer number (111127569840).

Almost surely, 2^{1231478210911} is an apocalyptic number.

1231478210911 is a deficient number, since it is larger than the sum of its proper divisors (102052627169).

1231478210911 is a wasteful number, since it uses less digits than its factorization.

1231478210911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200466 (or 200453 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 40.

The spelling of 1231478210911 in words is "one trillion, two hundred thirty-one billion, four hundred seventy-eight million, two hundred ten thousand, nine hundred eleven".