100021212112021 has 32 divisors (see below), whose sum is σ = 104071506739200. Its totient is φ = 96024511627200.

The previous prime is 100021212111967. The next prime is 100021212112051. The reversal of 100021212112021 is 120211212120001.

It is not a de Polignac number, because 100021212112021 - 2¹³ = 100021212103829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100021212111986 and 100021212112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021212112051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8549546430 + ... + 8549558128.

It is an arithmetic number, because the mean of its divisors is an integer number (3252234585600).

Almost surely, 2^{100021212112021} is an apocalyptic number.

It is an amenable number.

100021212112021 is a deficient number, since it is larger than the sum of its proper divisors (4050294627179).

100021212112021 is a wasteful number, since it uses less digits than its factorization.

100021212112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14545.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 100021212112021 its reverse (120211212120001), we get a palindrome (220232424232022).

The spelling of 100021212112021 in words is "one hundred trillion, twenty-one billion, two hundred twelve million, one hundred twelve thousand, twenty-one".