121331020201 has 4 divisors (see below), whose sum is σ = 122145322500. Its totient is φ = 120516717904.

The previous prime is 121331020199. The next prime is 121331020253. The reversal of 121331020201 is 102020133121.

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 6087744576 + 115243275625 = 78024^2 + 339475^2 .

It is a cyclic number.

It is not a de Polignac number, because 121331020201 - 2¹ = 121331020199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121331020301) 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, 407150926 + ... + 407151223.

It is an arithmetic number, because the mean of its divisors is an integer number (30536330625).

Almost surely, 2^121331020201 is an apocalyptic number.

It is an amenable number.

121331020201 is a deficient number, since it is larger than the sum of its proper divisors (814302299).

121331020201 is an equidigital number, since it uses as much as digits as its factorization.

121331020201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814302298.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 121331020201 its reverse (102020133121), we get a palindrome (223351153322).

The spelling of 121331020201 in words is "one hundred twenty-one billion, three hundred thirty-one million, twenty thousand, two hundred one".