1203254345521 has 4 divisors (see below), whose sum is σ = 1255569751872. Its totient is φ = 1150938939172.

The previous prime is 1203254345519. The next prime is 1203254345549. The reversal of 1203254345521 is 1255434523021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1203254345521 - 2¹ = 1203254345519 is a prime.

It is a super-2 number, since 2×1203254345521² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1203254345581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26157703141 + ... + 26157703186.

It is an arithmetic number, because the mean of its divisors is an integer number (313892437968).

Almost surely, 2^{1203254345521} is an apocalyptic number.

It is an amenable number.

1203254345521 is a deficient number, since it is larger than the sum of its proper divisors (52315406351).

1203254345521 is an equidigital number, since it uses as much as digits as its factorization.

1203254345521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52315406350.

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

Adding to 1203254345521 its reverse (1255434523021), we get a palindrome (2458688868542).

The spelling of 1203254345521 in words is "one trillion, two hundred three billion, two hundred fifty-four million, three hundred forty-five thousand, five hundred twenty-one".