1243121010371 has 2 divisors, whose sum is σ = 1243121010372. Its totient is φ = 1243121010370.

The previous prime is 1243121010367. The next prime is 1243121010427. The reversal of 1243121010371 is 1730101213421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1243121010371 - 2² = 1243121010367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1243121010371.

It is not a weakly prime, because it can be changed into another prime (1243121010301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621560505185 + 621560505186.

It is an arithmetic number, because the mean of its divisors is an integer number (621560505186).

Almost surely, 2^{1243121010371} is an apocalyptic number.

1243121010371 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243121010371 is an equidigital number, since it uses as much as digits as its factorization.

1243121010371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

Adding to 1243121010371 its reverse (1730101213421), we get a palindrome (2973222223792).

The spelling of 1243121010371 in words is "one trillion, two hundred forty-three billion, one hundred twenty-one million, ten thousand, three hundred seventy-one".