1212212021233 has 2 divisors, whose sum is σ = 1212212021234. Its totient is φ = 1212212021232.

The previous prime is 1212212021203. The next prime is 1212212021249. The reversal of 1212212021233 is 3321202122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 856056104289 + 356155916944 = 925233^2 + 596788^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212212021233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212212021203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606106010616 + 606106010617.

It is an arithmetic number, because the mean of its divisors is an integer number (606106010617).

Almost surely, 2^{1212212021233} is an apocalyptic number.

It is an amenable number.

1212212021233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212212021233 is an equidigital number, since it uses as much as digits as its factorization.

1212212021233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1212212021233 its reverse (3321202122121), we get a palindrome (4533414143354).

The spelling of 1212212021233 in words is "one trillion, two hundred twelve billion, two hundred twelve million, twenty-one thousand, two hundred thirty-three".