100121212221211 has 4 divisors (see below), whose sum is σ = 100128515554800. Its totient is φ = 100113908887624.

The previous prime is 100121212221209. The next prime is 100121212221227. The reversal of 100121212221211 is 112122212121001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100121212221211 - 2¹ = 100121212221209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100121212201211) 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, 3651646231 + ... + 3651673648.

It is an arithmetic number, because the mean of its divisors is an integer number (25032128888700).

Almost surely, 2^{100121212221211} is an apocalyptic number.

100121212221211 is a deficient number, since it is larger than the sum of its proper divisors (7303333589).

100121212221211 is an equidigital number, since it uses as much as digits as its factorization.

100121212221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7303333588.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 100121212221211 its reverse (112122212121001), we get a palindrome (212243424342212).

The spelling of 100121212221211 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, two hundred eleven".