1000021201321 has 4 divisors (see below), whose sum is σ = 1001933288272. Its totient is φ = 998109114372.

The previous prime is 1000021201279. The next prime is 1000021201331. The reversal of 1000021201321 is 1231021200001.

1000021201321 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 not a de Polignac number, because 1000021201321 - 2¹¹ = 1000021199273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000021201331) 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, 956042691 + ... + 956043736.

It is an arithmetic number, because the mean of its divisors is an integer number (250483322068).

Almost surely, 2^{1000021201321} is an apocalyptic number.

It is an amenable number.

1000021201321 is a deficient number, since it is larger than the sum of its proper divisors (1912086951).

1000021201321 is an equidigital number, since it uses as much as digits as its factorization.

1000021201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912086950.

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

Adding to 1000021201321 its reverse (1231021200001), we get a palindrome (2231042401322).

The spelling of 1000021201321 in words is "one trillion, twenty-one million, two hundred one thousand, three hundred twenty-one".