100121212221011 has 4 divisors (see below), whose sum is σ = 100121528470392. Its totient is φ = 100120895971632.

The previous prime is 100121212220941. The next prime is 100121212221013. The reversal of 100121212221011 is 110122212121001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100121212221011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100121212221013) 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, 157649330 + ... + 158283143.

It is an arithmetic number, because the mean of its divisors is an integer number (25030382117598).

Almost surely, 2^{100121212221011} is an apocalyptic number.

100121212221011 is a deficient number, since it is larger than the sum of its proper divisors (316249381).

100121212221011 is an equidigital number, since it uses as much as digits as its factorization.

100121212221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316249380.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 100121212221011 its reverse (110122212121001), we get a palindrome (210243424342012).

The spelling of 100121212221011 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, eleven".