1312111100122 has 4 divisors (see below), whose sum is σ = 1968166650186. Its totient is φ = 656055550060.

The previous prime is 1312111100087. The next prime is 1312111100227. The reversal of 1312111100122 is 2210011112131.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1086762465441 + 225348634681 = 1042479^2 + 474709^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1312111100096 and 1312111100105.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328027775029 + ... + 328027775032.

Almost surely, 2^{1312111100122} is an apocalyptic number.

1312111100122 is a deficient number, since it is larger than the sum of its proper divisors (656055550064).

1312111100122 is an equidigital number, since it uses as much as digits as its factorization.

1312111100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656055550063.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1312111100122 its reverse (2210011112131), we get a palindrome (3522122212253).

The spelling of 1312111100122 in words is "one trillion, three hundred twelve billion, one hundred eleven million, one hundred thousand, one hundred twenty-two".