1221410041253 has 2 divisors, whose sum is σ = 1221410041254. Its totient is φ = 1221410041252.

The previous prime is 1221410041219. The next prime is 1221410041337. The reversal of 1221410041253 is 3521400141221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667216149889 + 554193891364 = 816833^2 + 744442^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221410041253 - 2²⁴ = 1221393264037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221410049253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610705020626 + 610705020627.

It is an arithmetic number, because the mean of its divisors is an integer number (610705020627).

Almost surely, 2^{1221410041253} is an apocalyptic number.

It is an amenable number.

1221410041253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221410041253 is an equidigital number, since it uses as much as digits as its factorization.

1221410041253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 1221410041253 its reverse (3521400141221), we get a palindrome (4742810182474).

The spelling of 1221410041253 in words is "one trillion, two hundred twenty-one billion, four hundred ten million, forty-one thousand, two hundred fifty-three".