1001222220020 has 48 divisors (see below), whose sum is σ = 2303994889728. Its totient is φ = 362448140160.

The previous prime is 1001222220017. The next prime is 1001222220067. The reversal of 1001222220020 is 200222221001.

It is a super-3 number, since 3×1001222220020³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001222219977 and 1001222220004.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 10154999 + ... + 10253118.

It is an arithmetic number, because the mean of its divisors is an integer number (47999893536).

Almost surely, 2^{1001222220020} is an apocalyptic number.

1001222220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001222220020 is an abundant number, since it is smaller than the sum of its proper divisors (1302772669708).

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

1001222220020 is a wasteful number, since it uses less digits than its factorization.

1001222220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20408360 (or 20408358 counting only the distinct ones).

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

Adding to 1001222220020 its reverse (200222221001), we get a palindrome (1201444441021).

The spelling of 1001222220020 in words is "one trillion, one billion, two hundred twenty-two million, two hundred twenty thousand, twenty".