205134342122 has 4 divisors (see below), whose sum is σ = 307701513186. Its totient is φ = 102567171060.

The previous prime is 205134342109. The next prime is 205134342139. The reversal of 205134342122 is 221243431502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 119149922761 + 85984419361 = 345181^2 + 293231^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51283585529 + ... + 51283585532.

Almost surely, 2^205134342122 is an apocalyptic number.

205134342122 is a deficient number, since it is larger than the sum of its proper divisors (102567171064).

205134342122 is a wasteful number, since it uses less digits than its factorization.

205134342122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102567171063.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 205134342122 its reverse (221243431502), we get a palindrome (426377773624).

The spelling of 205134342122 in words is "two hundred five billion, one hundred thirty-four million, three hundred forty-two thousand, one hundred twenty-two".