1221102133 has 2 divisors, whose sum is σ = 1221102134. Its totient is φ = 1221102132.

The previous prime is 1221102067. The next prime is 1221102151. The reversal of 1221102133 is 3312011221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1193149764 + 27952369 = 34542^2 + 5287^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221102133 - 2⁹ = 1221101621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221102193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610551066 + 610551067.

It is an arithmetic number, because the mean of its divisors is an integer number (610551067).

Almost surely, 2^1221102133 is an apocalyptic number.

It is an amenable number.

1221102133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221102133 is an equidigital number, since it uses as much as digits as its factorization.

1221102133 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 16.

The square root of 1221102133 is about 34944.2718195701. The cubic root of 1221102133 is about 1068.8513988447.

Adding to 1221102133 its reverse (3312011221), we get a palindrome (4533113354).

The spelling of 1221102133 in words is "one billion, two hundred twenty-one million, one hundred two thousand, one hundred thirty-three".