2021220112212 has 96 divisors (see below), whose sum is σ = 6032514512640. Its totient is φ = 573276165120.

The previous prime is 2021220112201. The next prime is 2021220112213. The reversal of 2021220112212 is 2122110221202.

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 (2021220112213) 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, 9653989 + ... + 9861132.

It is an arithmetic number, because the mean of its divisors is an integer number (62838692840).

Almost surely, 2^{2021220112212} is an apocalyptic number.

It is an amenable number.

2021220112212 is an abundant number, since it is smaller than the sum of its proper divisors (4011294400428).

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

2021220112212 is a wasteful number, since it uses less digits than its factorization.

2021220112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19515278 (or 19515270 counting only the distinct ones).

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

Adding to 2021220112212 its reverse (2122110221202), we get a palindrome (4143330333414).

The spelling of 2021220112212 in words is "two trillion, twenty-one billion, two hundred twenty million, one hundred twelve thousand, two hundred twelve".