121020010202221 has 4 divisors (see below), whose sum is σ = 130329241756252. Its totient is φ = 111710778648192.

The previous prime is 121020010202213. The next prime is 121020010202243. The reversal of 121020010202221 is 122202010020121.

It is a happy number.

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 9569655632196 + 111450354570025 = 3093486^2 + 10557005^2 .

It is a cyclic number.

It is not a de Polignac number, because 121020010202221 - 2³ = 121020010202213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121020010202195 and 121020010202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020010202261) 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, 4654615776996 + ... + 4654615777021.

It is an arithmetic number, because the mean of its divisors is an integer number (32582310439063).

Almost surely, 2^{121020010202221} is an apocalyptic number.

It is an amenable number.

121020010202221 is a deficient number, since it is larger than the sum of its proper divisors (9309231554031).

121020010202221 is an equidigital number, since it uses as much as digits as its factorization.

121020010202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9309231554030.

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

Adding to 121020010202221 its reverse (122202010020121), we get a palindrome (243222020222342).

The spelling of 121020010202221 in words is "one hundred twenty-one trillion, twenty billion, ten million, two hundred two thousand, two hundred twenty-one".