20311201012 has 6 divisors (see below), whose sum is σ = 35544601778. Its totient is φ = 10155600504.

The previous prime is 20311200997. The next prime is 20311201033. The reversal of 20311201012 is 21010211302.

It can be written as a sum of positive squares in only one way, i.e., 12000326116 + 8310874896 = 109546^2 + 91164^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20311200983 and 20311201001.

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, 2538900123 + ... + 2538900130.

Almost surely, 2^20311201012 is an apocalyptic number.

It is an amenable number.

20311201012 is a deficient number, since it is larger than the sum of its proper divisors (15233400766).

20311201012 is a wasteful number, since it uses less digits than its factorization.

20311201012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5077800257 (or 5077800255 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20311201012 its reverse (21010211302), we get a palindrome (41321412314).

The spelling of 20311201012 in words is "twenty billion, three hundred eleven million, two hundred one thousand, twelve".