2001022201020 has 24 divisors (see below), whose sum is σ = 5602862163024. Its totient is φ = 533605920256.

The previous prime is 2001022200997. The next prime is 2001022201109. The reversal of 2001022201020 is 201022201002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2001022200987 and 2001022201005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16675184949 + ... + 16675185068.

It is an arithmetic number, because the mean of its divisors is an integer number (233452590126).

Almost surely, 2^{2001022201020} is an apocalyptic number.

2001022201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001022201020 is an abundant number, since it is smaller than the sum of its proper divisors (3601839962004).

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

2001022201020 is a wasteful number, since it uses less digits than its factorization.

2001022201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33350370029 (or 33350370027 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 2001022201020 its reverse (201022201002), we get a palindrome (2202044402022).

The spelling of 2001022201020 in words is "two trillion, one billion, twenty-two million, two hundred one thousand, twenty".