1255521321004 has 24 divisors (see below), whose sum is σ = 2263186781856. Its totient is φ = 609065712000.

The previous prime is 1255521320987. The next prime is 1255521321011. The reversal of 1255521321004 is 4001231255521.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21118432 + ... + 21177799.

It is an arithmetic number, because the mean of its divisors is an integer number (94299449244).

Almost surely, 2^{1255521321004} is an apocalyptic number.

It is an amenable number.

1255521321004 is a deficient number, since it is larger than the sum of its proper divisors (1007665460852).

1255521321004 is a wasteful number, since it uses less digits than its factorization.

1255521321004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42296457 (or 42296455 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 1255521321004 its reverse (4001231255521), we get a palindrome (5256752576525).

The spelling of 1255521321004 in words is "one trillion, two hundred fifty-five billion, five hundred twenty-one million, three hundred twenty-one thousand, four".