1326121650253 has 4 divisors (see below), whose sum is σ = 1335662093920. Its totient is φ = 1316581206588.

The previous prime is 1326121650239. The next prime is 1326121650277. The reversal of 1326121650253 is 3520561216231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1326121650253 - 2¹³ = 1326121642061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326121690253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4770221625 + ... + 4770221902.

It is an arithmetic number, because the mean of its divisors is an integer number (333915523480).

Almost surely, 2^{1326121650253} is an apocalyptic number.

It is an amenable number.

1326121650253 is a deficient number, since it is larger than the sum of its proper divisors (9540443667).

1326121650253 is an equidigital number, since it uses as much as digits as its factorization.

1326121650253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9540443666.

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 1326121650253 its reverse (3520561216231), we get a palindrome (4846682866484).

The spelling of 1326121650253 in words is "one trillion, three hundred twenty-six billion, one hundred twenty-one million, six hundred fifty thousand, two hundred fifty-three".