1231205153253 has 8 divisors (see below), whose sum is σ = 1641615040416. Its totient is φ = 820799350800.

The previous prime is 1231205153249. The next prime is 1231205153293. The reversal of 1231205153253 is 3523515021321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231205153253 - 2² = 1231205153249 is a prime.

It is a super-2 number, since 2×1231205153253² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231205153293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230383 + ... + 1586028.

It is an arithmetic number, because the mean of its divisors is an integer number (205201880052).

Almost surely, 2^{1231205153253} is an apocalyptic number.

It is an amenable number.

1231205153253 is a deficient number, since it is larger than the sum of its proper divisors (410409887163).

1231205153253 is a wasteful number, since it uses less digits than its factorization.

1231205153253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042355.

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 1231205153253 in words is "one trillion, two hundred thirty-one billion, two hundred five million, one hundred fifty-three thousand, two hundred fifty-three".