1211132011321 has 2 divisors, whose sum is σ = 1211132011322. Its totient is φ = 1211132011320.

The previous prime is 1211132011319. The next prime is 1211132011337. The reversal of 1211132011321 is 1231102311121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 929209242025 + 281922769296 = 963955^2 + 530964^2 .

It is an emirp because it is prime and its reverse (1231102311121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211132011321 - 2¹ = 1211132011319 is a prime.

Together with 1211132011319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1211132011301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605566005660 + 605566005661.

It is an arithmetic number, because the mean of its divisors is an integer number (605566005661).

Almost surely, 2^{1211132011321} is an apocalyptic number.

It is an amenable number.

1211132011321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211132011321 is an equidigital number, since it uses as much as digits as its factorization.

1211132011321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1211132011321 its reverse (1231102311121), we get a palindrome (2442234322442).

The spelling of 1211132011321 in words is "one trillion, two hundred eleven billion, one hundred thirty-two million, eleven thousand, three hundred twenty-one".