121212020210221 has 8 divisors (see below), whose sum is σ = 126486626419584. Its totient is φ = 115937790532080.

The previous prime is 121212020210191. The next prime is 121212020210227. The reversal of 121212020210221 is 122012020212121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121212020210221 - 2⁵ = 121212020210189 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 (121212020210227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93474865 + ... + 94762726.

It is an arithmetic number, because the mean of its divisors is an integer number (15810828302448).

Almost surely, 2^{121212020210221} is an apocalyptic number.

It is an amenable number.

121212020210221 is a deficient number, since it is larger than the sum of its proper divisors (5274606209363).

121212020210221 is a wasteful number, since it uses less digits than its factorization.

121212020210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188265611.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121212020210221 its reverse (122012020212121), we get a palindrome (243224040422342).

The spelling of 121212020210221 in words is "one hundred twenty-one trillion, two hundred twelve billion, twenty million, two hundred ten thousand, two hundred twenty-one".