1083991240201 has 3 divisors (see below), whose sum is σ = 1083992281351. Its totient is φ = 1083990199052.

The previous prime is 1083991240193. The next prime is 1083991240231. The reversal of 1083991240201 is 1020421993801.

It is a happy number.

The square root of 1083991240201 is 1041149.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 102030201 + 1083889210000 = 10101^2 + 1041100^2 .

It is not a de Polignac number, because 1083991240201 - 2³ = 1083991240193 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1083991240231) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 520575 + ... + 1561723.

Almost surely, 2^{1083991240201} is an apocalyptic number.

1083991240201 is the 1041149-th square number.

1083991240201 is the 520575-th centered octagonal number.

It is an amenable number.

1083991240201 is a deficient number, since it is larger than the sum of its proper divisors (1041150).

1083991240201 is an frugal number, since it uses more digits than its factorization.

1083991240201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082298 (or 1041149 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 1083991240201 in words is "one trillion, eighty-three billion, nine hundred ninety-one million, two hundred forty thousand, two hundred one".