1213542303452 has 24 divisors (see below), whose sum is σ = 2143673975520. Its totient is φ = 601066578240.

The previous prime is 1213542303437. The next prime is 1213542303497. The reversal of 1213542303452 is 2543032453121.

It is a super-2 number, since 2×1213542303452² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1597538 + ... + 2231414.

It is an arithmetic number, because the mean of its divisors is an integer number (89319748980).

Almost surely, 2^{1213542303452} is an apocalyptic number.

It is an amenable number.

1213542303452 is a deficient number, since it is larger than the sum of its proper divisors (930131672068).

1213542303452 is a wasteful number, since it uses less digits than its factorization.

1213542303452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638381 (or 638379 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 1213542303452 its reverse (2543032453121), we get a palindrome (3756574756573).

The spelling of 1213542303452 in words is "one trillion, two hundred thirteen billion, five hundred forty-two million, three hundred three thousand, four hundred fifty-two".