1355560255021 has 8 divisors (see below), whose sum is σ = 1549633762944. Its totient is φ = 1161592257840.

The previous prime is 1355560255009. The next prime is 1355560255051. The reversal of 1355560255021 is 1205520655531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1355560255021 - 2⁹ = 1355560254509 is a prime.

It is a super-3 number, since 3×1355560255021³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355560255051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26350150 + ... + 26401543.

It is an arithmetic number, because the mean of its divisors is an integer number (193704220368).

Almost surely, 2^{1355560255021} is an apocalyptic number.

It is an amenable number.

1355560255021 is a deficient number, since it is larger than the sum of its proper divisors (194073507923).

1355560255021 is an equidigital number, since it uses as much as digits as its factorization.

1355560255021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52755371.

The product of its (nonzero) digits is 225000, while the sum is 40.

The spelling of 1355560255021 in words is "one trillion, three hundred fifty-five billion, five hundred sixty million, two hundred fifty-five thousand, twenty-one".