1221022022201 has 2 divisors, whose sum is σ = 1221022022202. Its totient is φ = 1221022022200.

The previous prime is 1221022022123. The next prime is 1221022022279. The reversal of 1221022022201 is 1022202201221.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1221022022123) and next prime (1221022022279).

It can be written as a sum of positive squares in only one way, i.e., 673901437225 + 547120584976 = 820915^2 + 739676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221022022201 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221022022201.

It is not a weakly prime, because it can be changed into another prime (1221022522201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610511011100 + 610511011101.

It is an arithmetic number, because the mean of its divisors is an integer number (610511011101).

Almost surely, 2^{1221022022201} is an apocalyptic number.

It is an amenable number.

1221022022201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221022022201 is an equidigital number, since it uses as much as digits as its factorization.

1221022022201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1221022022201 its reverse (1022202201221), we get a palindrome (2243224223422).

The spelling of 1221022022201 in words is "one trillion, two hundred twenty-one billion, twenty-two million, twenty-two thousand, two hundred one".