121211202210001 has 4 divisors (see below), whose sum is σ = 121740508770100. Its totient is φ = 120681895649904.

The previous prime is 121211202209879. The next prime is 121211202210067. The reversal of 121211202210001 is 100012202112121.

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 79703398760976 + 41507803449025 = 8927676^2 + 6442655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121211202210001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121211202210701) 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, 264653279706 + ... + 264653280163.

It is an arithmetic number, because the mean of its divisors is an integer number (30435127192525).

Almost surely, 2^{121211202210001} is an apocalyptic number.

It is an amenable number.

121211202210001 is a deficient number, since it is larger than the sum of its proper divisors (529306560099).

121211202210001 is an equidigital number, since it uses as much as digits as its factorization.

121211202210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529306560098.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121211202210001 its reverse (100012202112121), we get a palindrome (221223404322122).

The spelling of 121211202210001 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred two million, two hundred ten thousand, one".