1231789717412 has 12 divisors (see below), whose sum is σ = 2167541575836. Its totient is φ = 612492124320.

The previous prime is 1231789717393. The next prime is 1231789717423. The reversal of 1231789717412 is 2147179871321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 81799432036 + 1149990285376 = 286006^2 + 1072376^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850682783 + ... + 850684230.

It is an arithmetic number, because the mean of its divisors is an integer number (180628464653).

Almost surely, 2^{1231789717412} is an apocalyptic number.

It is an amenable number.

1231789717412 is a deficient number, since it is larger than the sum of its proper divisors (935751858424).

1231789717412 is a wasteful number, since it uses less digits than its factorization.

1231789717412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701367198 (or 1701367196 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 53.

The spelling of 1231789717412 in words is "one trillion, two hundred thirty-one billion, seven hundred eighty-nine million, seven hundred seventeen thousand, four hundred twelve".