101210202100121 has 2 divisors, whose sum is σ = 101210202100122. Its totient is φ = 101210202100120.

The previous prime is 101210202100103. The next prime is 101210202100141. The reversal of 101210202100121 is 121001202012101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101161654147225 + 48547952896 = 10057915^2 + 220336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101210202100121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101210202100096 and 101210202100105.

It is not a weakly prime, because it can be changed into another prime (101210202100141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605101050060 + 50605101050061.

It is an arithmetic number, because the mean of its divisors is an integer number (50605101050061).

Almost surely, 2^{101210202100121} is an apocalyptic number.

It is an amenable number.

101210202100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

101210202100121 is an equidigital number, since it uses as much as digits as its factorization.

101210202100121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101210202100121 its reverse (121001202012101), we get a palindrome (222211404112222).

The spelling of 101210202100121 in words is "one hundred one trillion, two hundred ten billion, two hundred two million, one hundred thousand, one hundred twenty-one".