101001220121 has 4 divisors (see below), whose sum is σ = 101054690100. Its totient is φ = 100947750144.

The previous prime is 101001220109. The next prime is 101001220163. The reversal of 101001220121 is 121022100101.

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 67893598096 + 33107622025 = 260564^2 + 181955^2 .

It is a cyclic number.

It is not a de Polignac number, because 101001220121 - 2²² = 100997025817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101001222121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26732156 + ... + 26735933.

It is an arithmetic number, because the mean of its divisors is an integer number (25263672525).

Almost surely, 2^101001220121 is an apocalyptic number.

It is an amenable number.

101001220121 is a deficient number, since it is larger than the sum of its proper divisors (53469979).

101001220121 is an equidigital number, since it uses as much as digits as its factorization.

101001220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53469978.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101001220121 its reverse (121022100101), we get a palindrome (222023320222).

The spelling of 101001220121 in words is "one hundred one billion, one million, two hundred twenty thousand, one hundred twenty-one".