20211022212 has 12 divisors (see below), whose sum is σ = 47159051856. Its totient is φ = 6737007400.

The previous prime is 20211022211. The next prime is 20211022217. The reversal of 20211022212 is 21222011202.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20211022191 and 20211022200.

It is not an unprimeable number, because it can be changed into a prime (20211022211) 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 in 3 ways as a sum of consecutive naturals, for example, 842125914 + ... + 842125937.

It is an arithmetic number, because the mean of its divisors is an integer number (3929920988).

Almost surely, 2^20211022212 is an apocalyptic number.

It is an amenable number.

20211022212 is an abundant number, since it is smaller than the sum of its proper divisors (26948029644).

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

20211022212 is a wasteful number, since it uses less digits than its factorization.

20211022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684251858 (or 1684251856 counting only the distinct ones).

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

Adding to 20211022212 its reverse (21222011202), we get a palindrome (41433033414).

The spelling of 20211022212 in words is "twenty billion, two hundred eleven million, twenty-two thousand, two hundred twelve".