12222021100021 has 32 divisors (see below), whose sum is σ = 12799888984800. Its totient is φ = 11655573995520.

The previous prime is 12222021100013. The next prime is 12222021100027. The reversal of 12222021100021 is 12000112022221.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 7236799416900 + 4985221683121 = 2690130^2 + 2232761^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222021100021 - 2³ = 12222021100013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12222021099968 and 12222021100004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222021100027) 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, 1308422811 + ... + 1308432151.

It is an arithmetic number, because the mean of its divisors is an integer number (399996530775).

Almost surely, 2^{12222021100021} is an apocalyptic number.

It is an amenable number.

12222021100021 is a deficient number, since it is larger than the sum of its proper divisors (577867884779).

12222021100021 is a wasteful number, since it uses less digits than its factorization.

12222021100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11209.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12222021100021 its reverse (12000112022221), we get a palindrome (24222133122242).

The spelling of 12222021100021 in words is "twelve trillion, two hundred twenty-two billion, twenty-one million, one hundred thousand, twenty-one".