1320221010001 has 2 divisors, whose sum is σ = 1320221010002. Its totient is φ = 1320221010000.

The previous prime is 1320221009993. The next prime is 1320221010079. The reversal of 1320221010001 is 1000101220231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1292311966401 + 27909043600 = 1136799^2 + 167060^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320221010001 - 2³ = 1320221009993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320221040001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660110505000 + 660110505001.

It is an arithmetic number, because the mean of its divisors is an integer number (660110505001).

Almost surely, 2^{1320221010001} is an apocalyptic number.

It is an amenable number.

1320221010001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320221010001 is an equidigital number, since it uses as much as digits as its factorization.

1320221010001 is an evil number, because the sum of its binary digits is even.

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

Adding to 1320221010001 its reverse (1000101220231), we get a palindrome (2320322230232).

The spelling of 1320221010001 in words is "one trillion, three hundred twenty billion, two hundred twenty-one million, ten thousand, one".