1001201120021 has 4 divisors (see below), whose sum is σ = 1013874552000. Its totient is φ = 988527688044.

The previous prime is 1001201120009. The next prime is 1001201120057. The reversal of 1001201120021 is 1200211021001.

1001201120021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001201120021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1001201119984 and 1001201120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001201120321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6336715871 + ... + 6336716028.

It is an arithmetic number, because the mean of its divisors is an integer number (253468638000).

Almost surely, 2^{1001201120021} is an apocalyptic number.

It is an amenable number.

1001201120021 is a deficient number, since it is larger than the sum of its proper divisors (12673431979).

1001201120021 is an equidigital number, since it uses as much as digits as its factorization.

1001201120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12673431978.

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

Adding to 1001201120021 its reverse (1200211021001), we get a palindrome (2201412141022).

The spelling of 1001201120021 in words is "one trillion, one billion, two hundred one million, one hundred twenty thousand, twenty-one".