101220102121 has 4 divisors (see below), whose sum is σ = 104710450500. Its totient is φ = 97729753744.

The previous prime is 101220102077. The next prime is 101220102127. The reversal of 101220102121 is 121201022101.

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 33913064025 + 67307038096 = 184155^2 + 259436^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220102121 - 2²⁵ = 101186547689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101220102127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1745174146 + ... + 1745174203.

It is an arithmetic number, because the mean of its divisors is an integer number (26177612625).

Almost surely, 2^101220102121 is an apocalyptic number.

It is an amenable number.

101220102121 is a deficient number, since it is larger than the sum of its proper divisors (3490348379).

101220102121 is an equidigital number, since it uses as much as digits as its factorization.

101220102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490348378.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 101220102121 its reverse (121201022101), we get a palindrome (222421124222).

The spelling of 101220102121 in words is "one hundred one billion, two hundred twenty million, one hundred two thousand, one hundred twenty-one".