205211012 has 12 divisors (see below), whose sum is σ = 380244060. Its totient is φ = 96569856.

The previous prime is 205211011. The next prime is 205211021. The reversal of 205211012 is 210112502.

It can be written as a sum of positive squares in 2 ways, for example, as 148449856 + 56761156 = 12184^2 + 7534^2 .

It is a super-2 number, since 2×205211012² = 84223118892128288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205211011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508837 + ... + 1508972.

It is an arithmetic number, because the mean of its divisors is an integer number (31687005).

Almost surely, 2^205211012 is an apocalyptic number.

It is an amenable number.

205211012 is a deficient number, since it is larger than the sum of its proper divisors (175033048).

205211012 is a wasteful number, since it uses less digits than its factorization.

205211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017830 (or 3017828 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 205211012 is about 14325.1880266892. The cubic root of 205211012 is about 589.8390943002.

Adding to 205211012 its reverse (210112502), we get a palindrome (415323514).

The spelling of 205211012 in words is "two hundred five million, two hundred eleven thousand, twelve".