2002221221020 has 48 divisors (see below), whose sum is σ = 4247253698688. Its totient is φ = 792787890240.

The previous prime is 2002221220991. The next prime is 2002221221023. The reversal of 2002221221020 is 201221222002.

It is a junction number, because it is equal to n+sod(n) for n = 2002221220985 and 2002221221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002221221023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2400379 + ... + 3125101.

It is an arithmetic number, because the mean of its divisors is an integer number (88484452056).

Almost surely, 2^{2002221221020} is an apocalyptic number.

2002221221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2002221221020 is an abundant number, since it is smaller than the sum of its proper divisors (2245032477668).

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

2002221221020 is a wasteful number, since it uses less digits than its factorization.

2002221221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726130 (or 726128 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2002221221020 its reverse (201221222002), we get a palindrome (2203442443022).

The spelling of 2002221221020 in words is "two trillion, two billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty".