1326135082021 has 4 divisors (see below), whose sum is σ = 1354350722112. Its totient is φ = 1297919441932.

The previous prime is 1326135082003. The next prime is 1326135082033. The reversal of 1326135082021 is 1202805316231.

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 1326135082021 - 2⁷ = 1326135081893 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 (1326135082061) 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, 14107819975 + ... + 14107820068.

It is an arithmetic number, because the mean of its divisors is an integer number (338587680528).

Almost surely, 2^{1326135082021} is an apocalyptic number.

It is an amenable number.

1326135082021 is a deficient number, since it is larger than the sum of its proper divisors (28215640091).

1326135082021 is an equidigital number, since it uses as much as digits as its factorization.

1326135082021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28215640090.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 1326135082021 in words is "one trillion, three hundred twenty-six billion, one hundred thirty-five million, eighty-two thousand, twenty-one".