20211213212 has 12 divisors (see below), whose sum is σ = 35396286240. Its totient is φ = 10097988576.

The previous prime is 20211213193. The next prime is 20211213263. The reversal of 20211213212 is 21231211202.

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, 1898537 + ... + 1909152.

It is an arithmetic number, because the mean of its divisors is an integer number (2949690520).

Almost surely, 2^20211213212 is an apocalyptic number.

It is an amenable number.

20211213212 is a deficient number, since it is larger than the sum of its proper divisors (15185073028).

20211213212 is a wasteful number, since it uses less digits than its factorization.

20211213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3809020 (or 3809018 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20211213212 its reverse (21231211202), we get a palindrome (41442424414).

The spelling of 20211213212 in words is "twenty billion, two hundred eleven million, two hundred thirteen thousand, two hundred twelve".