1221122211053 has 2 divisors, whose sum is σ = 1221122211054. Its totient is φ = 1221122211052.

The previous prime is 1221122211011. The next prime is 1221122211097. The reversal of 1221122211053 is 3501122211221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1220278134244 + 844076809 = 1104662^2 + 29053^2 .

It is an emirp because it is prime and its reverse (3501122211221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221122211053 - 2²⁰ = 1221121162477 is a prime.

It is a super-2 number, since 2×1221122211053² (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 (1221122211553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610561105526 + 610561105527.

It is an arithmetic number, because the mean of its divisors is an integer number (610561105527).

Almost surely, 2^{1221122211053} is an apocalyptic number.

It is an amenable number.

1221122211053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221122211053 is an equidigital number, since it uses as much as digits as its factorization.

1221122211053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 1221122211053 its reverse (3501122211221), we get a palindrome (4722244422274).

The spelling of 1221122211053 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, fifty-three".