2021021220222 has 112 divisors (see below), whose sum is σ = 4613454630000. Its totient is φ = 663616685952.

The previous prime is 2021021220181. The next prime is 2021021220277. The reversal of 2021021220222 is 2220221201202.

2021021220222 is a `hidden beast` number, since 2 + 0 + 210 + 212 + 20 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 2021021220195 and 2021021220204.

It is a congruent number.

It is an unprimeable number.

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 55 ways as a sum of consecutive naturals, for example, 34877029 + ... + 34934927.

Almost surely, 2^{2021021220222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021021220222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2306727315000).

2021021220222 is an abundant number, since it is smaller than the sum of its proper divisors (2592433409778).

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

2021021220222 is an equidigital number, since it uses as much as digits as its factorization.

2021021220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58277 (or 58262 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2021021220222 its reverse (2220221201202), we get a palindrome (4241242421424).

The spelling of 2021021220222 in words is "two trillion, twenty-one billion, twenty-one million, two hundred twenty thousand, two hundred twenty-two".