21012022110321 has 32 divisors (see below), whose sum is σ = 33959163248640. Its totient is φ = 12734431491600.

The previous prime is 21012022110311. The next prime is 21012022110323. The reversal of 21012022110321 is 12301122021012.

21012022110321 is a `hidden beast` number, since 2 + 1 + 0 + 120 + 221 + 1 + 0 + 321 = 666.

It is not a de Polignac number, because 21012022110321 - 2¹⁸ = 21012021848177 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21012022110294 and 21012022110303.

It is not an unprimeable number, because it can be changed into a prime (21012022110323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35498236 + ... + 36085298.

It is an arithmetic number, because the mean of its divisors is an integer number (1061223851520).

Almost surely, 2^{21012022110321} is an apocalyptic number.

It is an amenable number.

21012022110321 is a deficient number, since it is larger than the sum of its proper divisors (12947141138319).

21012022110321 is a wasteful number, since it uses less digits than its factorization.

21012022110321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707594 (or 707588 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21012022110321 its reverse (12301122021012), we get a palindrome (33313144131333).

The spelling of 21012022110321 in words is "twenty-one trillion, twelve billion, twenty-two million, one hundred ten thousand, three hundred twenty-one".