1231254245055 has 16 divisors (see below), whose sum is σ = 1970151137280. Its totient is φ = 656620815648.

The previous prime is 1231254245047. The next prime is 1231254245059. The reversal of 1231254245055 is 5505424521321.

It is not a de Polignac number, because 1231254245055 - 2³ = 1231254245047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231254245059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2795167 + ... + 3205536.

It is an arithmetic number, because the mean of its divisors is an integer number (123134446080).

Almost surely, 2^{1231254245055} is an apocalyptic number.

1231254245055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1231254245055 is a deficient number, since it is larger than the sum of its proper divisors (738896892225).

1231254245055 is a wasteful number, since it uses less digits than its factorization.

1231254245055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6014390.

The product of its (nonzero) digits is 240000, while the sum is 39.

Adding to 1231254245055 its reverse (5505424521321), we get a palindrome (6736678766376).

The spelling of 1231254245055 in words is "one trillion, two hundred thirty-one billion, two hundred fifty-four million, two hundred forty-five thousand, fifty-five".