23111204021011 has 16 divisors (see below), whose sum is σ = 24027498784800. Its totient is φ = 22210388621568.

The previous prime is 23111204020907. The next prime is 23111204021023. The reversal of 23111204021011 is 11012040211132.

It is a cyclic number.

It is not a de Polignac number, because 23111204021011 - 2¹¹ = 23111204018963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23111204021011.

It is not an unprimeable number, because it can be changed into a prime (23111204091011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12097495 + ... + 13877023.

It is an arithmetic number, because the mean of its divisors is an integer number (1501718674050).

Almost surely, 2^{23111204021011} is an apocalyptic number.

23111204021011 is a deficient number, since it is larger than the sum of its proper divisors (916294763789).

23111204021011 is a wasteful number, since it uses less digits than its factorization.

23111204021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783878.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 23111204021011 its reverse (11012040211132), we get a palindrome (34123244232143).

The spelling of 23111204021011 in words is "twenty-three trillion, one hundred eleven billion, two hundred four million, twenty-one thousand, eleven".