1211323213153 has 2 divisors, whose sum is σ = 1211323213154. Its totient is φ = 1211323213152.

The previous prime is 1211323213127. The next prime is 1211323213171. The reversal of 1211323213153 is 3513123231121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1101624473889 + 109698739264 = 1049583^2 + 331208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211323213153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211323813153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605661606576 + 605661606577.

It is an arithmetic number, because the mean of its divisors is an integer number (605661606577).

Almost surely, 2^{1211323213153} is an apocalyptic number.

It is an amenable number.

1211323213153 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211323213153 is an equidigital number, since it uses as much as digits as its factorization.

1211323213153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

Adding to 1211323213153 its reverse (3513123231121), we get a palindrome (4724446444274).

The spelling of 1211323213153 in words is "one trillion, two hundred eleven billion, three hundred twenty-three million, two hundred thirteen thousand, one hundred fifty-three".