20111123041005 has 64 divisors (see below), whose sum is σ = 32934727203840. Its totient is φ = 10474651385856.

The previous prime is 20111123040881. The next prime is 20111123041033. The reversal of 20111123041005 is 50014032111102.

It is not a de Polignac number, because 20111123041005 - 2¹⁹ = 20111122516717 is a prime.

It is a super-2 number, since 2×20111123041005² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 625077099 + ... + 625109271.

It is an arithmetic number, because the mean of its divisors is an integer number (514605112560).

Almost surely, 2^{20111123041005} is an apocalyptic number.

It is an amenable number.

20111123041005 is a deficient number, since it is larger than the sum of its proper divisors (12823604162835).

20111123041005 is a wasteful number, since it uses less digits than its factorization.

20111123041005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34150.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 20111123041005 its reverse (50014032111102), we get a palindrome (70125155152107).

The spelling of 20111123041005 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-three million, forty-one thousand, five".