1213425253522 has 4 divisors (see below), whose sum is σ = 1820137880286. Its totient is φ = 606712626760.

The previous prime is 1213425253511. The next prime is 1213425253571. The reversal of 1213425253522 is 2253525243121.

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., 743870025441 + 469555228081 = 862479^2 + 685241^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303356313379 + ... + 303356313382.

Almost surely, 2^{1213425253522} is an apocalyptic number.

1213425253522 is a deficient number, since it is larger than the sum of its proper divisors (606712626764).

1213425253522 is an equidigital number, since it uses as much as digits as its factorization.

1213425253522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606712626763.

The product of its digits is 144000, while the sum is 37.

The spelling of 1213425253522 in words is "one trillion, two hundred thirteen billion, four hundred twenty-five million, two hundred fifty-three thousand, five hundred twenty-two".