1221310201933 has 2 divisors, whose sum is σ = 1221310201934. Its totient is φ = 1221310201932.

The previous prime is 1221310201921. The next prime is 1221310201961. The reversal of 1221310201933 is 3391020131221.

It is an a-pointer prime, because the next prime (1221310201961) can be obtained adding 1221310201933 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1203053598244 + 18256603689 = 1096838^2 + 135117^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221310201933 - 2²¹ = 1221308104781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221310205933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610655100966 + 610655100967.

It is an arithmetic number, because the mean of its divisors is an integer number (610655100967).

Almost surely, 2^{1221310201933} is an apocalyptic number.

It is an amenable number.

1221310201933 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221310201933 is an equidigital number, since it uses as much as digits as its factorization.

1221310201933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 1221310201933 in words is "one trillion, two hundred twenty-one billion, three hundred ten million, two hundred one thousand, nine hundred thirty-three".