20212111212220 has 24 divisors (see below), whose sum is σ = 42623029512000. Its totient is φ = 8051016681792.

The previous prime is 20212111212191. The next prime is 20212111212229. The reversal of 20212111212220 is 2221211121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212111212229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2114232795 + ... + 2114242354.

It is an arithmetic number, because the mean of its divisors is an integer number (1775959563000).

Almost surely, 2^{20212111212220} is an apocalyptic number.

20212111212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212111212220 is an abundant number, since it is smaller than the sum of its proper divisors (22410918299780).

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

20212111212220 is a wasteful number, since it uses less digits than its factorization.

20212111212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4228475397 (or 4228475395 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20212111212220 its reverse (2221211121202), we get a palindrome (22433322333422).

The spelling of 20212111212220 in words is "twenty trillion, two hundred twelve billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty".