1001121313021 has 8 divisors (see below), whose sum is σ = 1001830818240. Its totient is φ = 1000411977312.

The previous prime is 1001121312979. The next prime is 1001121313039. The reversal of 1001121313021 is 1203131211001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001121313021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001121312986 and 1001121313004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001121383021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13215270 + ... + 13290808.

It is an arithmetic number, because the mean of its divisors is an integer number (125228852280).

Almost surely, 2^{1001121313021} is an apocalyptic number.

It is an amenable number.

1001121313021 is a deficient number, since it is larger than the sum of its proper divisors (709505219).

1001121313021 is an equidigital number, since it uses as much as digits as its factorization.

1001121313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84755.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1001121313021 its reverse (1203131211001), we get a palindrome (2204252524022).

The spelling of 1001121313021 in words is "one trillion, one billion, one hundred twenty-one million, three hundred thirteen thousand, twenty-one".