22121100300421 has 4 divisors (see below), whose sum is σ = 22216040645292. Its totient is φ = 22026159955552.

The previous prime is 22121100300371. The next prime is 22121100300427. The reversal of 22121100300421 is 12400300112122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7786812116196 + 14334288184225 = 2790486^2 + 3786065^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121100300421 - 2²⁷ = 22120966082693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121100300427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47470172086 + ... + 47470172551.

It is an arithmetic number, because the mean of its divisors is an integer number (5554010161323).

Almost surely, 2^{22121100300421} is an apocalyptic number.

It is an amenable number.

22121100300421 is a deficient number, since it is larger than the sum of its proper divisors (94940344871).

22121100300421 is an equidigital number, since it uses as much as digits as its factorization.

22121100300421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94940344870.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 22121100300421 its reverse (12400300112122), we get a palindrome (34521400412543).

The spelling of 22121100300421 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred million, three hundred thousand, four hundred twenty-one".