20311001212 has 6 divisors (see below), whose sum is σ = 35544252128. Its totient is φ = 10155500604.

The previous prime is 20311001177. The next prime is 20311001219. The reversal of 20311001212 is 21210011302.

It is a junction number, because it is equal to n+sod(n) for n = 20311001192 and 20311001201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311001219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2538875148 + ... + 2538875155.

Almost surely, 2^20311001212 is an apocalyptic number.

It is an amenable number.

20311001212 is a deficient number, since it is larger than the sum of its proper divisors (15233250916).

20311001212 is a wasteful number, since it uses less digits than its factorization.

20311001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077750307 (or 5077750305 counting only the distinct ones).

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

Adding to 20311001212 its reverse (21210011302), we get a palindrome (41521012514).

The spelling of 20311001212 in words is "twenty billion, three hundred eleven million, one thousand, two hundred twelve".