20212221211212 has 48 divisors (see below), whose sum is σ = 47481630094080. Its totient is φ = 6691777167168.

The previous prime is 20212221211199. The next prime is 20212221211241. The reversal of 20212221211212 is 21211212221202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264723 + ... + 6363530.

It is an arithmetic number, because the mean of its divisors is an integer number (989200626960).

Almost surely, 2^{20212221211212} is an apocalyptic number.

It is an amenable number.

20212221211212 is an abundant number, since it is smaller than the sum of its proper divisors (27269408882868).

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

20212221211212 is a wasteful number, since it uses less digits than its factorization.

20212221211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6629982 (or 6629980 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 20212221211212 its reverse (21211212221202), we get a palindrome (41423433432414).

The spelling of 20212221211212 in words is "twenty trillion, two hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twelve".