20212011121212 has 18 divisors (see below), whose sum is σ = 51091472556488. Its totient is φ = 6737337040392.

The previous prime is 20212011121187. The next prime is 20212011121241. The reversal of 20212011121212 is 21212111021202.

20212011121212 is a `hidden beast` number, since 202 + 120 + 11 + 121 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 280722376648 + ... + 280722376719.

Almost surely, 2^{20212011121212} is an apocalyptic number.

It is an amenable number.

20212011121212 is an abundant number, since it is smaller than the sum of its proper divisors (30879461435276).

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

20212011121212 is a wasteful number, since it uses less digits than its factorization.

20212011121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561444753377 (or 561444753372 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20212011121212 its reverse (21212111021202), we get a palindrome (41424122142414).

It can be divided in two parts, 2021201 and 1121212, that added together give a palindrome (3142413).

The spelling of 20212011121212 in words is "twenty trillion, two hundred twelve billion, eleven million, one hundred twenty-one thousand, two hundred twelve".