20012311012 has 6 divisors (see below), whose sum is σ = 35021544278. Its totient is φ = 10006155504.

The previous prime is 20012310991. The next prime is 20012311021. The reversal of 20012311012 is 21011321002.

It can be written as a sum of positive squares in only one way, i.e., 16572957696 + 3439353316 = 128736^2 + 58646^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20012310983 and 20012311001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2501538873 + ... + 2501538880.

Almost surely, 2^20012311012 is an apocalyptic number.

It is an amenable number.

20012311012 is a deficient number, since it is larger than the sum of its proper divisors (15009233266).

20012311012 is a wasteful number, since it uses less digits than its factorization.

20012311012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003077757 (or 5003077755 counting only the distinct ones).

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

Adding to 20012311012 its reverse (21011321002), we get a palindrome (41023632014).

The spelling of 20012311012 in words is "twenty billion, twelve million, three hundred eleven thousand, twelve".