1335201049081 has 9 divisors (see below), whose sum is σ = 1347690109773. Its totient is φ = 1322826703200.

The previous prime is 1335201049069. The next prime is 1335201049139. The reversal of 1335201049081 is 1809401025331.

The square root of 1335201049081 is 1155509.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 421838559081 + 913362490000 = 649491^2 + 955700^2 .

It is not a de Polignac number, because 1335201049081 - 2²⁷ = 1335066831353 is a prime.

It is a super-2 number, since 2×1335201049081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1335201049081.

It is not an unprimeable number, because it can be changed into a prime (1335201049051) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 125945181 + ... + 125955781.

Almost surely, 2^{1335201049081} is an apocalyptic number.

1335201049081 is the 1155509-th square number.

1335201049081 is the 577755-th centered octagonal number.

It is an amenable number.

1335201049081 is a deficient number, since it is larger than the sum of its proper divisors (12489060692).

1335201049081 is an frugal number, since it uses more digits than its factorization.

1335201049081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21420 (or 10710 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 1335201049081 in words is "one trillion, three hundred thirty-five billion, two hundred one million, forty-nine thousand, eighty-one".