1021421413321 has 2 divisors, whose sum is σ = 1021421413322. Its totient is φ = 1021421413320.

The previous prime is 1021421413289. The next prime is 1021421413417. The reversal of 1021421413321 is 1233141241201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 800461249225 + 220960164096 = 894685^2 + 470064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021421413321 - 2⁵ = 1021421413289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021421413021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510710706660 + 510710706661.

It is an arithmetic number, because the mean of its divisors is an integer number (510710706661).

Almost surely, 2^{1021421413321} is an apocalyptic number.

It is an amenable number.

1021421413321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021421413321 is an equidigital number, since it uses as much as digits as its factorization.

1021421413321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1021421413321 its reverse (1233141241201), we get a palindrome (2254562654522).

The spelling of 1021421413321 in words is "one trillion, twenty-one billion, four hundred twenty-one million, four hundred thirteen thousand, three hundred twenty-one".