20312322212212 has 6 divisors (see below), whose sum is σ = 35546563871378. Its totient is φ = 10156161106104.

The previous prime is 20312322212191. The next prime is 20312322212219. The reversal of 20312322212212 is 21221222321302.

It can be written as a sum of positive squares in only one way, i.e., 14132156044176 + 6180166168036 = 3759276^2 + 2485994^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312322212219) by changing a digit.

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, 2539040276523 + ... + 2539040276530.

Almost surely, 2^{20312322212212} is an apocalyptic number.

It is an amenable number.

20312322212212 is a deficient number, since it is larger than the sum of its proper divisors (15234241659166).

20312322212212 is a wasteful number, since it uses less digits than its factorization.

20312322212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5078080553057 (or 5078080553055 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 20312322212212 its reverse (21221222321302), we get a palindrome (41533544533514).

The spelling of 20312322212212 in words is "twenty trillion, three hundred twelve billion, three hundred twenty-two million, two hundred twelve thousand, two hundred twelve".