205112012321255 has 64 divisors (see below), whose sum is σ = 281255944273920. Its totient is φ = 142454269900800.

The previous prime is 205112012321231. The next prime is 205112012321351. The reversal of 205112012321255 is 552123210211502.

205112012321255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205112012321255 - 2¹⁸ = 205112012059111 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24860210 + ... + 32066400.

It is an arithmetic number, because the mean of its divisors is an integer number (4394624129280).

Almost surely, 2^{205112012321255} is an apocalyptic number.

205112012321255 is a deficient number, since it is larger than the sum of its proper divisors (76143931952665).

205112012321255 is a wasteful number, since it uses less digits than its factorization.

205112012321255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7206552.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 205112012321255 its reverse (552123210211502), we get a palindrome (757235222532757).

The spelling of 205112012321255 in words is "two hundred five trillion, one hundred twelve billion, twelve million, three hundred twenty-one thousand, two hundred fifty-five".