1355113545021 has 6 divisors (see below), whose sum is σ = 1957386231710. Its totient is φ = 903409030008.

The previous prime is 1355113545001. The next prime is 1355113545029. The reversal of 1355113545021 is 1205453115531.

1355113545021 is a `hidden beast` number, since 1 + 3 + 5 + 51 + 135 + 450 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 930335482521 + 424778062500 = 964539^2 + 651750^2 .

It is not a de Polignac number, because 1355113545021 - 2⁵ = 1355113544989 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 (1355113545029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75284085826 + ... + 75284085843.

Almost surely, 2^{1355113545021} is an apocalyptic number.

It is an amenable number.

1355113545021 is a deficient number, since it is larger than the sum of its proper divisors (602272686689).

1355113545021 is a wasteful number, since it uses less digits than its factorization.

1355113545021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150568171675 (or 150568171672 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 1355113545021 in words is "one trillion, three hundred fifty-five billion, one hundred thirteen million, five hundred forty-five thousand, twenty-one".