1201121021329 has 2 divisors, whose sum is σ = 1201121021330. Its totient is φ = 1201121021328.

The previous prime is 1201121021267. The next prime is 1201121021389. The reversal of 1201121021329 is 9231201211021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1015967234304 + 185153787025 = 1007952^2 + 430295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201121021329 - 2¹¹ = 1201121019281 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201121021389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600560510664 + 600560510665.

It is an arithmetic number, because the mean of its divisors is an integer number (600560510665).

Almost surely, 2^{1201121021329} is an apocalyptic number.

It is an amenable number.

1201121021329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201121021329 is an equidigital number, since it uses as much as digits as its factorization.

1201121021329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 1201121021329 in words is "one trillion, two hundred one billion, one hundred twenty-one million, twenty-one thousand, three hundred twenty-nine".