1021220330022 has 64 divisors (see below), whose sum is σ = 2369905205760. Its totient is φ = 325350999072.

The previous prime is 1021220330017. The next prime is 1021220330029. The reversal of 1021220330022 is 2200330221201.

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 = 1021220329977 and 1021220330004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021220330029) 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, 1264093 + ... + 1907975.

It is an arithmetic number, because the mean of its divisors is an integer number (37029768840).

Almost surely, 2^{1021220330022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021220330022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1184952602880).

1021220330022 is an abundant number, since it is smaller than the sum of its proper divisors (1348684875738).

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

1021220330022 is a wasteful number, since it uses less digits than its factorization.

1021220330022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645194 (or 645188 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 1021220330022 its reverse (2200330221201), we get a palindrome (3221550551223).

The spelling of 1021220330022 in words is "one trillion, twenty-one billion, two hundred twenty million, three hundred thirty thousand, twenty-two".