121100221011 has 16 divisors (see below), whose sum is σ = 201309458688. Its totient is φ = 62909205600.

The previous prime is 121100220991. The next prime is 121100221027. The reversal of 121100221011 is 110122001121.

It is not a de Polignac number, because 121100221011 - 2⁹ = 121100220499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121100221091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262121460 + ... + 262121921.

It is an arithmetic number, because the mean of its divisors is an integer number (12581841168).

Almost surely, 2^121100221011 is an apocalyptic number.

121100221011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121100221011 is a deficient number, since it is larger than the sum of its proper divisors (80209237677).

121100221011 is a wasteful number, since it uses less digits than its factorization.

121100221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524243402.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121100221011 its reverse (110122001121), we get a palindrome (231222222132).

The spelling of 121100221011 in words is "one hundred twenty-one billion, one hundred million, two hundred twenty-one thousand, eleven".