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21031113041 = 66593158299
BaseRepresentation
bin10011100101100011…
…010101000101010001
32000021200202020102122
4103211203111011101
5321032431104131
613354521424025
71343112340241
oct234543250521
960250666378
1021031113041
118a12573564
1240ab33b015
131ca21b95b3
141037211b21
15831545d7b
hex4e58d5151

21031113041 has 4 divisors (see below), whose sum is σ = 21034278000. Its totient is φ = 21027948084.

The previous prime is 21031113023. The next prime is 21031113073. The reversal of 21031113041 is 14031113012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21031113041 - 226 = 20964004177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21031113001) 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, 1572491 + ... + 1585808.

It is an arithmetic number, because the mean of its divisors is an integer number (5258569500).

Almost surely, 221031113041 is an apocalyptic number.

It is an amenable number.

21031113041 is a deficient number, since it is larger than the sum of its proper divisors (3164959).

21031113041 is an equidigital number, since it uses as much as digits as its factorization.

21031113041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164958.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21031113041 its reverse (14031113012), we get a palindrome (35062226053).

The spelling of 21031113041 in words is "twenty-one billion, thirty-one million, one hundred thirteen thousand, forty-one".

Divisors: 1 6659 3158299 21031113041