121120202021201 has 4 divisors (see below), whose sum is σ = 128244919787172. Its totient is φ = 113995484255232.

The previous prime is 121120202021177. The next prime is 121120202021207. The reversal of 121120202021201 is 102120202021121.

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 104953980537025 + 16166221484176 = 10244705^2 + 4020724^2 .

It is not a de Polignac number, because 121120202021201 - 2¹⁴ = 121120202004817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7124717765953 = 121120202021201 / (1 + 2 + 1 + 1 + 2 + 0 + 2 + 0 + 2 + 0 + 2 + 1 + 2 + 0 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121120202021201.

It is not an unprimeable number, because it can be changed into a prime (121120202021207) 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, 3562358882960 + ... + 3562358882993.

It is an arithmetic number, because the mean of its divisors is an integer number (32061229946793).

Almost surely, 2^{121120202021201} is an apocalyptic number.

It is an amenable number.

121120202021201 is a deficient number, since it is larger than the sum of its proper divisors (7124717765971).

121120202021201 is an equidigital number, since it uses as much as digits as its factorization.

121120202021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7124717765970.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121120202021201 its reverse (102120202021121), we get a palindrome (223240404042322).

The spelling of 121120202021201 in words is "one hundred twenty-one trillion, one hundred twenty billion, two hundred two million, twenty-one thousand, two hundred one".