202020210000121 has 8 divisors (see below), whose sum is σ = 214989557614920. Its totient is φ = 189171507479808.

The previous prime is 202020210000083. The next prime is 202020210000131. The reversal of 202020210000121 is 121000012020202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 112969582551225 + 89050627448896 = 10628715^2 + 9436664^2 .

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 202020210000121 - 2⁹ = 202020209999609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202020210000131) 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, 30161270166 + ... + 30161276863.

It is an arithmetic number, because the mean of its divisors is an integer number (26873694701865).

Almost surely, 2^{202020210000121} is an apocalyptic number.

It is an amenable number.

202020210000121 is a deficient number, since it is larger than the sum of its proper divisors (12969347614799).

202020210000121 is a wasteful number, since it uses less digits than its factorization.

202020210000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60322547243.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202020210000121 its reverse (121000012020202), we get a palindrome (323020222020323).

The spelling of 202020210000121 in words is "two hundred two trillion, twenty billion, two hundred ten million, one hundred twenty-one", and thus it is an aban number.