1221110122411 has 2 divisors, whose sum is σ = 1221110122412. Its totient is φ = 1221110122410.

The previous prime is 1221110122399. The next prime is 1221110122423. The reversal of 1221110122411 is 1142210111221.

It is a balanced prime because it is at equal distance from previous prime (1221110122399) and next prime (1221110122423).

It is a cyclic number.

It is not a de Polignac number, because 1221110122411 - 2⁹ = 1221110121899 is a prime.

It is a super-2 number, since 2×1221110122411² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1221111122411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610555061205 + 610555061206.

It is an arithmetic number, because the mean of its divisors is an integer number (610555061206).

Almost surely, 2^{1221110122411} is an apocalyptic number.

1221110122411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221110122411 is an equidigital number, since it uses as much as digits as its factorization.

1221110122411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 1221110122411 its reverse (1142210111221), we get a palindrome (2363320233632).

The spelling of 1221110122411 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, one hundred twenty-two thousand, four hundred eleven".