1001022010020 has 72 divisors (see below), whose sum is σ = 3148893943104. Its totient is φ = 266939201376.

The previous prime is 1001022009997. The next prime is 1001022010049. The reversal of 1001022010020 is 200102201001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1001022009984 and 1001022010011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102980944 + ... + 102990663.

Almost surely, 2^{1001022010020} is an apocalyptic number.

1001022010020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001022010020 is an abundant number, since it is smaller than the sum of its proper divisors (2147871933084).

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

1001022010020 is a wasteful number, since it uses less digits than its factorization.

1001022010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205971631 (or 205971617 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1001022010020 its reverse (200102201001), we get a palindrome (1201124211021).

The spelling of 1001022010020 in words is "one trillion, one billion, twenty-two million, ten thousand, twenty".