1312100123198 has 4 divisors (see below), whose sum is σ = 1968150184800. Its totient is φ = 656050061598.

The previous prime is 1312100123197. The next prime is 1312100123203. The reversal of 1312100123198 is 8913210012131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312100123197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328025030798 + ... + 328025030801.

It is an arithmetic number, because the mean of its divisors is an integer number (492037546200).

Almost surely, 2^{1312100123198} is an apocalyptic number.

1312100123198 is a deficient number, since it is larger than the sum of its proper divisors (656050061602).

1312100123198 is an equidigital number, since it uses as much as digits as its factorization.

1312100123198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656050061601.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 1312100123198 in words is "one trillion, three hundred twelve billion, one hundred million, one hundred twenty-three thousand, one hundred ninety-eight".