781124221022231 has 4 divisors (see below), whose sum is σ = 827072704611792. Its totient is φ = 735175737432672.

The previous prime is 781124221022219. The next prime is 781124221022263. The reversal of 781124221022231 is 132220122421187.

781124221022231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-781124221022231 is a prime.

It is a super-2 number, since 2×781124221022231² (a number of 31 digits) contains 22 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 (781124229022231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22974241794755 + ... + 22974241794788.

It is an arithmetic number, because the mean of its divisors is an integer number (206768176152948).

Almost surely, 2^{781124221022231} is an apocalyptic number.

781124221022231 is a deficient number, since it is larger than the sum of its proper divisors (45948483589561).

781124221022231 is a wasteful number, since it uses less digits than its factorization.

781124221022231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45948483589560.

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 781124221022231 in words is "seven hundred eighty-one trillion, one hundred twenty-four billion, two hundred twenty-one million, twenty-two thousand, two hundred thirty-one".