101004202021 has 4 divisors (see below), whose sum is σ = 101303918092. Its totient is φ = 100704485952.

The previous prime is 101004202009. The next prime is 101004202069. The reversal of 101004202021 is 120202400101.

It is a happy number.

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 28850721025 + 72153480996 = 169855^2 + 268614^2 .

It is a cyclic number.

It is not a de Polignac number, because 101004202021 - 2¹¹ = 101004199973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101004201992 and 101004202010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101004202121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149857530 + ... + 149858203.

It is an arithmetic number, because the mean of its divisors is an integer number (25325979523).

Almost surely, 2^101004202021 is an apocalyptic number.

It is an amenable number.

101004202021 is a deficient number, since it is larger than the sum of its proper divisors (299716071).

101004202021 is an equidigital number, since it uses as much as digits as its factorization.

101004202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299716070.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 101004202021 its reverse (120202400101), we get a palindrome (221206602122).

The spelling of 101004202021 in words is "one hundred one billion, four million, two hundred two thousand, twenty-one".