1001203201021 has 4 divisors (see below), whose sum is σ = 1001906788672. Its totient is φ = 1000499613372.

The previous prime is 1001203201013. The next prime is 1001203201051. The reversal of 1001203201021 is 1201023021001.

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 not a de Polignac number, because 1001203201021 - 2³ = 1001203201013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001203200992 and 1001203201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001203201051) 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, 351791691 + ... + 351794536.

It is an arithmetic number, because the mean of its divisors is an integer number (250476697168).

Almost surely, 2^{1001203201021} is an apocalyptic number.

It is an amenable number.

1001203201021 is a deficient number, since it is larger than the sum of its proper divisors (703587651).

1001203201021 is an equidigital number, since it uses as much as digits as its factorization.

1001203201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703587650.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1001203201021 its reverse (1201023021001), we get a palindrome (2202226222022).

The spelling of 1001203201021 in words is "one trillion, one billion, two hundred three million, two hundred one thousand, twenty-one".