1321211301061 has 2 divisors, whose sum is σ = 1321211301062. Its totient is φ = 1321211301060.

The previous prime is 1321211301037. The next prime is 1321211301143. The reversal of 1321211301061 is 1601031121231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 787718376225 + 533492924836 = 887535^2 + 730406^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321211301061 - 2¹⁹ = 1321210776773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321211301961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660605650530 + 660605650531.

It is an arithmetic number, because the mean of its divisors is an integer number (660605650531).

Almost surely, 2^{1321211301061} is an apocalyptic number.

It is an amenable number.

1321211301061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321211301061 is an equidigital number, since it uses as much as digits as its factorization.

1321211301061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 1321211301061 its reverse (1601031121231), we get a palindrome (2922242422292).

The spelling of 1321211301061 in words is "one trillion, three hundred twenty-one billion, two hundred eleven million, three hundred one thousand, sixty-one".