1212111021101 has 2 divisors, whose sum is σ = 1212111021102. Its totient is φ = 1212111021100.

The previous prime is 1212111021053. The next prime is 1212111021133. The reversal of 1212111021101 is 1011201112121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 984806155876 + 227304865225 = 992374^2 + 476765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212111021101 - 2³⁴ = 1194931151917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212111021161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606055510550 + 606055510551.

It is an arithmetic number, because the mean of its divisors is an integer number (606055510551).

Almost surely, 2^{1212111021101} is an apocalyptic number.

It is an amenable number.

1212111021101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212111021101 is an equidigital number, since it uses as much as digits as its factorization.

1212111021101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1212111021101 its reverse (1011201112121), we get a palindrome (2223312133222).

The spelling of 1212111021101 in words is "one trillion, two hundred twelve billion, one hundred eleven million, twenty-one thousand, one hundred one".