1221102211271 has 2 divisors, whose sum is σ = 1221102211272. Its totient is φ = 1221102211270.

The previous prime is 1221102211193. The next prime is 1221102211289. The reversal of 1221102211271 is 1721122011221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221102211271 - 2¹⁰ = 1221102210247 is a prime.

It is a super-2 number, since 2×1221102211271² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221107211271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610551105635 + 610551105636.

It is an arithmetic number, because the mean of its divisors is an integer number (610551105636).

Almost surely, 2^{1221102211271} is an apocalyptic number.

1221102211271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221102211271 is an equidigital number, since it uses as much as digits as its factorization.

1221102211271 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 23.

Adding to 1221102211271 its reverse (1721122011221), we get a palindrome (2942224222492).

The spelling of 1221102211271 in words is "one trillion, two hundred twenty-one billion, one hundred two million, two hundred eleven thousand, two hundred seventy-one".