21470102244121 has 4 divisors (see below), whose sum is σ = 21875198512932. Its totient is φ = 21065005975312.

The previous prime is 21470102244103. The next prime is 21470102244193. The reversal of 21470102244121 is 12144220107412.

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 18221586255625 + 3248515988496 = 4268675^2 + 1802364^2 .

It is a cyclic number.

It is not a de Polignac number, because 21470102244121 - 2⁵ = 21470102244089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21470102844121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202548134326 + ... + 202548134431.

It is an arithmetic number, because the mean of its divisors is an integer number (5468799628233).

Almost surely, 2^{21470102244121} is an apocalyptic number.

It is an amenable number.

21470102244121 is a deficient number, since it is larger than the sum of its proper divisors (405096268811).

21470102244121 is an equidigital number, since it uses as much as digits as its factorization.

21470102244121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405096268810.

The product of its (nonzero) digits is 7168, while the sum is 31.

The spelling of 21470102244121 in words is "twenty-one trillion, four hundred seventy billion, one hundred two million, two hundred forty-four thousand, one hundred twenty-one".