1355005412021 has 4 divisors (see below), whose sum is σ = 1355027287200. Its totient is φ = 1354983536844.

The previous prime is 1355005412003. The next prime is 1355005412071. The reversal of 1355005412021 is 1202145005531.

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 1355005412021 - 2²⁶ = 1354938303157 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 (1355005412071) 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, 10844411 + ... + 10968648.

It is an arithmetic number, because the mean of its divisors is an integer number (338756821800).

Almost surely, 2^{1355005412021} is an apocalyptic number.

It is an amenable number.

1355005412021 is a deficient number, since it is larger than the sum of its proper divisors (21875179).

1355005412021 is an equidigital number, since it uses as much as digits as its factorization.

1355005412021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21875178.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 1355005412021 in words is "one trillion, three hundred fifty-five billion, five million, four hundred twelve thousand, twenty-one".