20211210012 has 24 divisors (see below), whose sum is σ = 53896560256. Its totient is φ = 5774631408.

The previous prime is 20211209969. The next prime is 20211210013. The reversal of 20211210012 is 21001211202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20211210012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211210013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120304738 + ... + 120304905.

Almost surely, 2^20211210012 is an apocalyptic number.

It is an amenable number.

20211210012 is an abundant number, since it is smaller than the sum of its proper divisors (33685350244).

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

20211210012 is a wasteful number, since it uses less digits than its factorization.

20211210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240609657 (or 240609655 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20211210012 its reverse (21001211202), we get a palindrome (41212421214).

The spelling of 20211210012 in words is "twenty billion, two hundred eleven million, two hundred ten thousand, twelve".