1021321201 has 4 divisors (see below), whose sum is σ = 1024605504. Its totient is φ = 1018036900.

The previous prime is 1021321181. The next prime is 1021321219. The reversal of 1021321201 is 1021231201.

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 1021321201 - 2⁷ = 1021321073 is a prime.

It is a super-2 number, since 2×1021321201² = 2086193991224164802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021321271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641685 + ... + 1642306.

It is an arithmetic number, because the mean of its divisors is an integer number (256151376).

Almost surely, 2^1021321201 is an apocalyptic number.

It is an amenable number.

1021321201 is a deficient number, since it is larger than the sum of its proper divisors (3284303).

1021321201 is an equidigital number, since it uses as much as digits as its factorization.

1021321201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3284302.

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

The square root of 1021321201 is about 31958.1163556302. The cubic root of 1021321201 is about 1007.0571465265.

Adding to 1021321201 its reverse (1021231201), we get a palindrome (2042552402).

Subtracting from 1021321201 its reverse (1021231201), we obtain a square (90000 = 300²).

The spelling of 1021321201 in words is "one billion, twenty-one million, three hundred twenty-one thousand, two hundred one".