1213425253571 has 2 divisors, whose sum is σ = 1213425253572. Its totient is φ = 1213425253570.

The previous prime is 1213425253511. The next prime is 1213425253597. The reversal of 1213425253571 is 1753525243121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213425253571 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213425253511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606712626785 + 606712626786.

It is an arithmetic number, because the mean of its divisors is an integer number (606712626786).

Almost surely, 2^{1213425253571} is an apocalyptic number.

1213425253571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213425253571 is an equidigital number, since it uses as much as digits as its factorization.

1213425253571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 41.

The spelling of 1213425253571 in words is "one trillion, two hundred thirteen billion, four hundred twenty-five million, two hundred fifty-three thousand, five hundred seventy-one".