1221102113423 has 2 divisors, whose sum is σ = 1221102113424. Its totient is φ = 1221102113422.

The previous prime is 1221102113369. The next prime is 1221102113431. The reversal of 1221102113423 is 3243112011221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221102113423 - 2⁸ = 1221102113167 is a prime.

It is a super-2 number, since 2×1221102113423² (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 (1221102113323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610551056711 + 610551056712.

It is an arithmetic number, because the mean of its divisors is an integer number (610551056712).

Almost surely, 2^{1221102113423} is an apocalyptic number.

1221102113423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221102113423 is an equidigital number, since it uses as much as digits as its factorization.

1221102113423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1221102113423 its reverse (3243112011221), we get a palindrome (4464214124644).

The spelling of 1221102113423 in words is "one trillion, two hundred twenty-one billion, one hundred two million, one hundred thirteen thousand, four hundred twenty-three".