1312311102121 has 8 divisors (see below), whose sum is σ = 1390011381000. Its totient is φ = 1234666990848.

The previous prime is 1312311102083. The next prime is 1312311102133. The reversal of 1312311102121 is 1212011132131.

It can be written as a sum of positive squares in 4 ways, for example, as 169197304896 + 1143113797225 = 411336^2 + 1069165^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312311102121 - 2²¹ = 1312309004969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312311112121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13993786 + ... + 14087251.

It is an arithmetic number, because the mean of its divisors is an integer number (173751422625).

Almost surely, 2^{1312311102121} is an apocalyptic number.

It is an amenable number.

1312311102121 is a deficient number, since it is larger than the sum of its proper divisors (77700278879).

1312311102121 is a wasteful number, since it uses less digits than its factorization.

1312311102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28083803.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1312311102121 its reverse (1212011132131), we get a palindrome (2524322234252).

The spelling of 1312311102121 in words is "one trillion, three hundred twelve billion, three hundred eleven million, one hundred two thousand, one hundred twenty-one".