2021022220986 has 72 divisors (see below), whose sum is σ = 4663577128860. Its totient is φ = 632415614976.

The previous prime is 2021022220967. The next prime is 2021022220991. The reversal of 2021022220986 is 6890222201202.

It can be written as a sum of positive squares in 6 ways, for example, as 1105305282225 + 915716938761 = 1051335^2 + 956931^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2021022220986.

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 35 ways as a sum of consecutive naturals, for example, 1524210 + ... + 2522946.

Almost surely, 2^{2021022220986} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021022220986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2331788564430).

2021022220986 is an abundant number, since it is smaller than the sum of its proper divisors (2642554907874).

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

2021022220986 is a wasteful number, since it uses less digits than its factorization.

2021022220986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999168 (or 999148 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 2021022220986 in words is "two trillion, twenty-one billion, twenty-two million, two hundred twenty thousand, nine hundred eighty-six".