1002022221020 has 96 divisors (see below), whose sum is σ = 2191230921600. Its totient is φ = 384426635264.

The previous prime is 1002022220987. The next prime is 1002022221041. The reversal of 1002022221020 is 201222202001.

It is a junction number, because it is equal to n+sod(n) for n = 1002022220986 and 1002022221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255030416 + ... + 255034344.

It is an arithmetic number, because the mean of its divisors is an integer number (22825322100).

Almost surely, 2^{1002022221020} is an apocalyptic number.

1002022221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002022221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1095615460800).

1002022221020 is an abundant number, since it is smaller than the sum of its proper divisors (1189208700580).

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

1002022221020 is a wasteful number, since it uses less digits than its factorization.

1002022221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6767 (or 6765 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1002022221020 its reverse (201222202001), we get a palindrome (1203244423021).

The spelling of 1002022221020 in words is "one trillion, two billion, twenty-two million, two hundred twenty-one thousand, twenty".