205212120146 has 64 divisors (see below), whose sum is σ = 342790963200. Its totient is φ = 91358779200.

The previous prime is 205212120103. The next prime is 205212120149. The reversal of 205212120146 is 641021212502.

It is a super-2 number, since 2×205212120146² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205212120149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166974260 + ... + 166975488.

It is an arithmetic number, because the mean of its divisors is an integer number (5356108800).

Almost surely, 2^205212120146 is an apocalyptic number.

205212120146 is a deficient number, since it is larger than the sum of its proper divisors (137578843054).

205212120146 is a wasteful number, since it uses less digits than its factorization.

205212120146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 205212120146 its reverse (641021212502), we get a palindrome (846233332648).

The spelling of 205212120146 in words is "two hundred five billion, two hundred twelve million, one hundred twenty thousand, one hundred forty-six".