21123323022111 has 16 divisors (see below), whose sum is σ = 29646867840000. Its totient is φ = 13341001710528.

The previous prime is 21123323022097. The next prime is 21123323022119. The reversal of 21123323022111 is 11122032332112.

It is not a de Polignac number, because 21123323022111 - 2²⁶ = 21123255913247 is a prime.

It is a super-3 number, since 3×21123323022111³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123323022119) 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, 29143890 + ... + 29859888.

It is an arithmetic number, because the mean of its divisors is an integer number (1852929240000).

Almost surely, 2^{21123323022111} is an apocalyptic number.

21123323022111 is a deficient number, since it is larger than the sum of its proper divisors (8523544817889).

21123323022111 is a wasteful number, since it uses less digits than its factorization.

21123323022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233598.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21123323022111 its reverse (11122032332112), we get a palindrome (32245355354223).

The spelling of 21123323022111 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred twenty-three million, twenty-two thousand, one hundred eleven".