101020200101 has 4 divisors (see below), whose sum is σ = 102020400204. Its totient is φ = 100020000000.

The previous prime is 101020200077. The next prime is 101020200109. The reversal of 101020200101 is 101002020101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101002020101 = 101 ⋅1000020001.

It can be written as a sum of positive squares in 2 ways, for example, as 43959412225 + 57060787876 = 209665^2 + 238874^2 .

It is a cyclic number.

It is not a de Polignac number, because 101020200101 - 2¹⁸ = 101019937957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101020200109) 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, 500099900 + ... + 500100101.

It is an arithmetic number, because the mean of its divisors is an integer number (25505100051).

Almost surely, 2^101020200101 is an apocalyptic number.

It is an amenable number.

101020200101 is a deficient number, since it is larger than the sum of its proper divisors (1000200103).

101020200101 is a wasteful number, since it uses less digits than its factorization.

101020200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000200102.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 101020200101 its reverse (101002020101), we get a palindrome (202022220202).

The spelling of 101020200101 in words is "one hundred one billion, twenty million, two hundred thousand, one hundred one".