100121220011 has 4 divisors (see below), whose sum is σ = 100123031232. Its totient is φ = 100119408792.

The previous prime is 100121219999. The next prime is 100121220047. The reversal of 100121220011 is 110022121001.

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-100121220011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100121219974 and 100121220001.

It is not an unprimeable number, because it can be changed into a prime (100121220071) 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, 819995 + ... + 934148.

It is an arithmetic number, because the mean of its divisors is an integer number (25030757808).

Almost surely, 2^100121220011 is an apocalyptic number.

100121220011 is a deficient number, since it is larger than the sum of its proper divisors (1811221).

100121220011 is an equidigital number, since it uses as much as digits as its factorization.

100121220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811220.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100121220011 its reverse (110022121001), we get a palindrome (210143341012).

The spelling of 100121220011 in words is "one hundred billion, one hundred twenty-one million, two hundred twenty thousand, eleven".