20202211212 has 12 divisors (see below), whose sum is σ = 47138492856. Its totient is φ = 6734070400.

The previous prime is 20202211121. The next prime is 20202211213. The reversal of 20202211212 is 21211220202.

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 = 20202211191 and 20202211200.

It is not an unprimeable number, because it can be changed into a prime (20202211213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 841758789 + ... + 841758812.

It is an arithmetic number, because the mean of its divisors is an integer number (3928207738).

Almost surely, 2^20202211212 is an apocalyptic number.

It is an amenable number.

20202211212 is an abundant number, since it is smaller than the sum of its proper divisors (26936281644).

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

20202211212 is a wasteful number, since it uses less digits than its factorization.

20202211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683517608 (or 1683517606 counting only the distinct ones).

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

Adding to 20202211212 its reverse (21211220202), we get a palindrome (41413431414).

The spelling of 20202211212 in words is "twenty billion, two hundred two million, two hundred eleven thousand, two hundred twelve".