1211022201113 has 2 divisors, whose sum is σ = 1211022201114. Its totient is φ = 1211022201112.

The previous prime is 1211022201097. The next prime is 1211022201199. The reversal of 1211022201113 is 3111022201121.

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., 703120821529 + 507901379584 = 838523^2 + 712672^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211022201113 - 2⁴ = 1211022201097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211022201091 and 1211022201100.

It is not a weakly prime, because it can be changed into another prime (1211022201413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605511100556 + 605511100557.

It is an arithmetic number, because the mean of its divisors is an integer number (605511100557).

Almost surely, 2^{1211022201113} is an apocalyptic number.

It is an amenable number.

1211022201113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211022201113 is an equidigital number, since it uses as much as digits as its factorization.

1211022201113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1211022201113 its reverse (3111022201121), we get a palindrome (4322044402234).

The spelling of 1211022201113 in words is "one trillion, two hundred eleven billion, twenty-two million, two hundred one thousand, one hundred thirteen".