781221011201103 has 32 divisors (see below), whose sum is σ = 1137148655841792. Its totient is φ = 473122737532800.

The previous prime is 781221011201089. The next prime is 781221011201123. The reversal of 781221011201103 is 301102110122187.

It is not a de Polignac number, because 781221011201103 - 2¹³ = 781221011192911 is a prime.

It is a super-2 number, since 2×781221011201103² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781221011201123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262890325 + ... + 265845377.

It is an arithmetic number, because the mean of its divisors is an integer number (35535895495056).

Almost surely, 2^{781221011201103} is an apocalyptic number.

781221011201103 is a deficient number, since it is larger than the sum of its proper divisors (355927644640689).

781221011201103 is a wasteful number, since it uses less digits than its factorization.

781221011201103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2960895.

The product of its (nonzero) digits is 1344, while the sum is 30.

The spelling of 781221011201103 in words is "seven hundred eighty-one trillion, two hundred twenty-one billion, eleven million, two hundred one thousand, one hundred three".