1001120021021 has 8 divisors (see below), whose sum is σ = 1002465301344. Its totient is φ = 999774928080.

The previous prime is 1001120021009. The next prime is 1001120021071. The reversal of 1001120021021 is 1201200211001.

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

It is a cyclic number.

It is not a de Polignac number, because 1001120021021 - 2¹⁴ = 1001120004637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001120020993 and 1001120021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001120021071) 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, 13097711 + ... + 13173923.

It is an arithmetic number, because the mean of its divisors is an integer number (125308162668).

Almost surely, 2^{1001120021021} is an apocalyptic number.

It is an amenable number.

1001120021021 is a deficient number, since it is larger than the sum of its proper divisors (1345280323).

1001120021021 is an equidigital number, since it uses as much as digits as its factorization.

1001120021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93691.

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

Adding to 1001120021021 its reverse (1201200211001), we get a palindrome (2202320232022).

The spelling of 1001120021021 in words is "one trillion, one billion, one hundred twenty million, twenty-one thousand, twenty-one".