1221022102171 has 2 divisors, whose sum is σ = 1221022102172. Its totient is φ = 1221022102170.

The previous prime is 1221022102133. The next prime is 1221022102229. The reversal of 1221022102171 is 1712012201221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221022102171 is a prime.

It is a super-3 number, since 3×1221022102171³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1221022102871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610511051085 + 610511051086.

It is an arithmetic number, because the mean of its divisors is an integer number (610511051086).

Almost surely, 2^{1221022102171} is an apocalyptic number.

1221022102171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221022102171 is an equidigital number, since it uses as much as digits as its factorization.

1221022102171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 1221022102171 its reverse (1712012201221), we get a palindrome (2933034303392).

The spelling of 1221022102171 in words is "one trillion, two hundred twenty-one billion, twenty-two million, one hundred two thousand, one hundred seventy-one".