100021212021 has 8 divisors (see below), whose sum is σ = 133397413504. Its totient is φ = 66662909280.

The previous prime is 100021212017. The next prime is 100021212089. The reversal of 100021212021 is 120212120001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100021212021 - 2² = 100021212017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100021211988 and 100021212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021212001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4461640 + ... + 4484001.

It is an arithmetic number, because the mean of its divisors is an integer number (16674676688).

Almost surely, 2^100021212021 is an apocalyptic number.

It is an amenable number.

100021212021 is a deficient number, since it is larger than the sum of its proper divisors (33376201483).

100021212021 is an equidigital number, since it uses as much as digits as its factorization.

100021212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8949371.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100021212021 its reverse (120212120001), we get a palindrome (220233332022).

The spelling of 100021212021 in words is "one hundred billion, twenty-one million, two hundred twelve thousand, twenty-one".