100011212121021 has 8 divisors (see below), whose sum is σ = 133352891808480. Its totient is φ = 66671836923792.

The previous prime is 100011212120993. The next prime is 100011212121077. The reversal of 100011212121021 is 120121212110001.

It is a happy number.

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

It is not a de Polignac number, because 100011212121021 - 2²⁷ = 100011077903293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100011212111021) 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, 576021291 + ... + 576194888.

It is an arithmetic number, because the mean of its divisors is an integer number (16669111476060).

Almost surely, 2^{100011212121021} is an apocalyptic number.

It is an amenable number.

100011212121021 is a deficient number, since it is larger than the sum of its proper divisors (33341679687459).

100011212121021 is a wasteful number, since it uses less digits than its factorization.

100011212121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152245115.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 100011212121021 its reverse (120121212110001), we get a palindrome (220132424231022).

The spelling of 100011212121021 in words is "one hundred trillion, eleven billion, two hundred twelve million, one hundred twenty-one thousand, twenty-one".