20212212210 has 64 divisors (see below), whose sum is σ = 49305784320. Its totient is φ = 5302123200.

The previous prime is 20212212199. The next prime is 20212212211. The reversal of 20212212210 is 1221221202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20212212210.

It is not an unprimeable number, because it can be changed into a prime (20212212211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 444931 + ... + 488249.

It is an arithmetic number, because the mean of its divisors is an integer number (770402880).

Almost surely, 2^20212212210 is an apocalyptic number.

20212212210 is an abundant number, since it is smaller than the sum of its proper divisors (29093572110).

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

20212212210 is a wasteful number, since it uses less digits than its factorization.

20212212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43583.

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

Adding to 20212212210 its reverse (1221221202), we get a palindrome (21433433412).

The spelling of 20212212210 in words is "twenty billion, two hundred twelve million, two hundred twelve thousand, two hundred ten".