20311112212 has 6 divisors (see below), whose sum is σ = 35544446378. Its totient is φ = 10155556104.

The previous prime is 20311112209. The next prime is 20311112257. The reversal of 20311112212 is 21221111302.

It can be written as a sum of positive squares in only one way, i.e., 14284074256 + 6027037956 = 119516^2 + 77634^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2538889023 + ... + 2538889030.

Almost surely, 2^20311112212 is an apocalyptic number.

It is an amenable number.

20311112212 is a deficient number, since it is larger than the sum of its proper divisors (15233334166).

20311112212 is a wasteful number, since it uses less digits than its factorization.

20311112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5077778057 (or 5077778055 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20311112212 its reverse (21221111302), we get a palindrome (41532223514).

The spelling of 20311112212 in words is "twenty billion, three hundred eleven million, one hundred twelve thousand, two hundred twelve".