1312121051 has 2 divisors, whose sum is σ = 1312121052. Its totient is φ = 1312121050.

The previous prime is 1312121009. The next prime is 1312121071. The reversal of 1312121051 is 1501212131.

It is a strong prime.

It is an emirp because it is prime and its reverse (1501212131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312121051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312121071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656060525 + 656060526.

It is an arithmetic number, because the mean of its divisors is an integer number (656060526).

Almost surely, 2^1312121051 is an apocalyptic number.

1312121051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312121051 is an equidigital number, since it uses as much as digits as its factorization.

1312121051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1312121051 is about 36223.2114948413. The cubic root of 1312121051 is about 1094.7744024864.

Adding to 1312121051 its reverse (1501212131), we get a palindrome (2813333182).

The spelling of 1312121051 in words is "one billion, three hundred twelve million, one hundred twenty-one thousand, fifty-one".