1001211120021 has 8 divisors (see below), whose sum is σ = 1525655040064. Its totient is φ = 572120640000.

The previous prime is 1001211120017. The next prime is 1001211120029. The reversal of 1001211120021 is 1200211121001.

1001211120021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1001211120021 - 2² = 1001211120017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001211119979 and 1001211120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001211120029) 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, 23838359980 + ... + 23838360021.

It is an arithmetic number, because the mean of its divisors is an integer number (190706880008).

Almost surely, 2^{1001211120021} is an apocalyptic number.

It is an amenable number.

1001211120021 is a deficient number, since it is larger than the sum of its proper divisors (524443920043).

1001211120021 is an equidigital number, since it uses as much as digits as its factorization.

1001211120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47676720011.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1001211120021 its reverse (1200211121001), we get a palindrome (2201422241022).

The spelling of 1001211120021 in words is "one trillion, one billion, two hundred eleven million, one hundred twenty thousand, twenty-one".