21122121011323 has 8 divisors (see below), whose sum is σ = 21860359592400. Its totient is φ = 20394504568320.

The previous prime is 21122121011311. The next prime is 21122121011351. The reversal of 21122121011323 is 32311012122112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21122121011323 - 2³³ = 21113531076731 is a prime.

It is a super-2 number, since 2×21122121011323² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21122121011294 and 21122121011303.

It is not an unprimeable number, because it can be changed into a prime (21122121011353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2655530473 + ... + 2655538426.

It is an arithmetic number, because the mean of its divisors is an integer number (2732544949050).

Almost surely, 2^{21122121011323} is an apocalyptic number.

21122121011323 is a deficient number, since it is larger than the sum of its proper divisors (738238581077).

21122121011323 is an equidigital number, since it uses as much as digits as its factorization.

21122121011323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5311069037.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21122121011323 its reverse (32311012122112), we get a palindrome (53433133133435).

The spelling of 21122121011323 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-one million, eleven thousand, three hundred twenty-three".