2021120212212 has 96 divisors (see below), whose sum is σ = 5416991395200. Its totient is φ = 651244665600.

The previous prime is 2021120212147. The next prime is 2021120212217. The reversal of 2021120212212 is 2122120211202.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021120212217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1611114 + ... + 2576417.

It is an arithmetic number, because the mean of its divisors is an integer number (56426993700).

Almost surely, 2^{2021120212212} is an apocalyptic number.

It is an amenable number.

2021120212212 is an abundant number, since it is smaller than the sum of its proper divisors (3395871182988).

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

2021120212212 is a wasteful number, since it uses less digits than its factorization.

2021120212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187694 (or 4187686 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2021120212212 its reverse (2122120211202), we get a palindrome (4143240423414).

The spelling of 2021120212212 in words is "two trillion, twenty-one billion, one hundred twenty million, two hundred twelve thousand, two hundred twelve".