1202021321 has 2 divisors, whose sum is σ = 1202021322. Its totient is φ = 1202021320.

The previous prime is 1202021299. The next prime is 1202021323. The reversal of 1202021321 is 1231202021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1144807225 + 57214096 = 33835^2 + 7564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202021321 is a prime.

It is a super-2 number, since 2×1202021321² = 2889710512277170082, which contains 22 as substring.

Together with 1202021323, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1202021296 and 1202021305.

It is not a weakly prime, because it can be changed into another prime (1202021323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601010660 + 601010661.

It is an arithmetic number, because the mean of its divisors is an integer number (601010661).

Almost surely, 2^1202021321 is an apocalyptic number.

It is an amenable number.

1202021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202021321 is an equidigital number, since it uses as much as digits as its factorization.

1202021321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1202021321 is about 34670.1791313515. The cubic root of 1202021321 is about 1063.2548939517.

Adding to 1202021321 its reverse (1231202021), we get a palindrome (2433223342).

The spelling of 1202021321 in words is "one billion, two hundred two million, twenty-one thousand, three hundred twenty-one".