1001121310020 has 96 divisors (see below), whose sum is σ = 3019887335808. Its totient is φ = 246338307072.

The previous prime is 1001121310001. The next prime is 1001121310043. The reversal of 1001121310020 is 200131211001.

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 = 1001121309978 and 1001121310005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1874392 + ... + 2348528.

It is an arithmetic number, because the mean of its divisors is an integer number (31457159748).

Almost surely, 2^{1001121310020} is an apocalyptic number.

1001121310020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001121310020 is an abundant number, since it is smaller than the sum of its proper divisors (2018766025788).

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

1001121310020 is a wasteful number, since it uses less digits than its factorization.

1001121310020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476869 (or 476867 counting only the distinct ones).

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

Adding to 1001121310020 its reverse (200131211001), we get a palindrome (1201252521021).

The spelling of 1001121310020 in words is "one trillion, one billion, one hundred twenty-one million, three hundred ten thousand, twenty".