20201212212 has 24 divisors (see below), whose sum is σ = 47139136800. Its totient is φ = 6733312416.

The previous prime is 20201212211. The next prime is 20201212231. The reversal of 20201212212 is 21221210202.

It is a junction number, because it is equal to n+sod(n) for n = 20201212191 and 20201212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201212211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189114 + ... + 275982.

It is an arithmetic number, because the mean of its divisors is an integer number (1964130700).

Almost surely, 2^20201212212 is an apocalyptic number.

It is an amenable number.

20201212212 is an abundant number, since it is smaller than the sum of its proper divisors (26937924588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20201212212 is a wasteful number, since it uses less digits than its factorization.

20201212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106255 (or 106253 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20201212212 its reverse (21221210202), we get a palindrome (41422422414).

The spelling of 20201212212 in words is "twenty billion, two hundred one million, two hundred twelve thousand, two hundred twelve".