121210112120201 has 4 divisors (see below), whose sum is σ = 130533966898692. Its totient is φ = 111886257341712.

The previous prime is 121210112120171. The next prime is 121210112120233. The reversal of 121210112120201 is 102021211012121.

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 39967380544576 + 81242731575625 = 6321976^2 + 9013475^2 .

It is a cyclic number.

It is not a de Polignac number, because 121210112120201 - 2⁶ = 121210112120137 is a prime.

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 121210112120201.

It is not an unprimeable number, because it can be changed into a prime (121210112120401) 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, 4661927389226 + ... + 4661927389251.

It is an arithmetic number, because the mean of its divisors is an integer number (32633491724673).

Almost surely, 2^{121210112120201} is an apocalyptic number.

It is an amenable number.

121210112120201 is a deficient number, since it is larger than the sum of its proper divisors (9323854778491).

121210112120201 is an equidigital number, since it uses as much as digits as its factorization.

121210112120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9323854778490.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121210112120201 its reverse (102021211012121), we get a palindrome (223231323132322).

The spelling of 121210112120201 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twelve million, one hundred twenty thousand, two hundred one".