1001011122020 has 48 divisors (see below), whose sum is σ = 2587228750848. Its totient is φ = 316803519360.

The previous prime is 1001011121989. The next prime is 1001011122029. The reversal of 1001011122020 is 202211101001.

It is a junction number, because it is equal to n+sod(n) for n = 1001011121992 and 1001011122010.

It is not an unprimeable number, because it can be changed into a prime (1001011122029) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 275001236 + ... + 275004875.

It is an arithmetic number, because the mean of its divisors is an integer number (53900598976).

Almost surely, 2^{1001011122020} is an apocalyptic number.

1001011122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001011122020 is an abundant number, since it is smaller than the sum of its proper divisors (1586217628828).

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

1001011122020 is a wasteful number, since it uses less digits than its factorization.

1001011122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550006140 (or 550006138 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001011122020 its reverse (202211101001), we get a palindrome (1203222223021).

The spelling of 1001011122020 in words is "one trillion, one billion, eleven million, one hundred twenty-two thousand, twenty".