1222212501161 has 2 divisors, whose sum is σ = 1222212501162. Its totient is φ = 1222212501160.

The previous prime is 1222212501113. The next prime is 1222212501197. The reversal of 1222212501161 is 1611052122221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1119776658025 + 102435843136 = 1058195^2 + 320056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222212501161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222212501161.

It is not a weakly prime, because it can be changed into another prime (1222212506161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611106250580 + 611106250581.

It is an arithmetic number, because the mean of its divisors is an integer number (611106250581).

Almost surely, 2^{1222212501161} is an apocalyptic number.

It is an amenable number.

1222212501161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222212501161 is an equidigital number, since it uses as much as digits as its factorization.

1222212501161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 26.

Adding to 1222212501161 its reverse (1611052122221), we get a palindrome (2833264623382).

The spelling of 1222212501161 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, five hundred one thousand, one hundred sixty-one".