1212111021133 has 2 divisors, whose sum is σ = 1212111021134. Its totient is φ = 1212111021132.

The previous prime is 1212111021101. The next prime is 1212111021161. The reversal of 1212111021133 is 3311201112121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1104186944809 + 107924076324 = 1050803^2 + 328518^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212111021133 - 2⁵ = 1212111021101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212111021133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212111027133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606055510566 + 606055510567.

It is an arithmetic number, because the mean of its divisors is an integer number (606055510567).

Almost surely, 2^{1212111021133} is an apocalyptic number.

It is an amenable number.

1212111021133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212111021133 is an equidigital number, since it uses as much as digits as its factorization.

1212111021133 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 1212111021133 its reverse (3311201112121), we get a palindrome (4523312133254).

The spelling of 1212111021133 in words is "one trillion, two hundred twelve billion, one hundred eleven million, twenty-one thousand, one hundred thirty-three".