101220111220121 has 2 divisors, whose sum is σ = 101220111220122. Its totient is φ = 101220111220120.

The previous prime is 101220111220103. The next prime is 101220111220181. The reversal of 101220111220121 is 121022111022101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82705928718400 + 18514182501721 = 9094280^2 + 4302811^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220111220121 - 2²⁶ = 101220044111257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101220111220121.

It is not a weakly prime, because it can be changed into another prime (101220111220181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610055610060 + 50610055610061.

It is an arithmetic number, because the mean of its divisors is an integer number (50610055610061).

Almost surely, 2^{101220111220121} is an apocalyptic number.

It is an amenable number.

101220111220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220111220121 is an equidigital number, since it uses as much as digits as its factorization.

101220111220121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 101220111220121 its reverse (121022111022101), we get a palindrome (222242222242222).

The spelling of 101220111220121 in words is "one hundred one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty-one".