20211020212 has 12 divisors (see below), whose sum is σ = 36036630756. Its totient is φ = 9914840000.

The previous prime is 20211020189. The next prime is 20211020279. The reversal of 20211020212 is 21202011202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14487492496 + 5723527716 = 120364^2 + 75654^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20211020192 and 20211020201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47667289 + ... + 47667712.

It is an arithmetic number, because the mean of its divisors is an integer number (3003052563).

Almost surely, 2^20211020212 is an apocalyptic number.

It is an amenable number.

20211020212 is a deficient number, since it is larger than the sum of its proper divisors (15825610544).

20211020212 is a wasteful number, since it uses less digits than its factorization.

20211020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95335058 (or 95335056 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20211020212 its reverse (21202011202), we get a palindrome (41413031414).

The spelling of 20211020212 in words is "twenty billion, two hundred eleven million, twenty thousand, two hundred twelve".