100121221011111 has 32 divisors (see below), whose sum is σ = 137601302071296. Its totient is φ = 64715767776000.

The previous prime is 100121221011101. The next prime is 100121221011121. The reversal of 100121221011111 is 111110122121001.

It is an interprime number because it is at equal distance from previous prime (100121221011101) and next prime (100121221011121).

It is not a de Polignac number, because 100121221011111 - 2⁷ = 100121221010983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121221011101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9450246 + ... + 17016156.

It is an arithmetic number, because the mean of its divisors is an integer number (4300040689728).

Almost surely, 2^{100121221011111} is an apocalyptic number.

100121221011111 is a deficient number, since it is larger than the sum of its proper divisors (37480081060185).

100121221011111 is a wasteful number, since it uses less digits than its factorization.

100121221011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7566623.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 100121221011111 its reverse (111110122121001), we get a palindrome (211231343132112).

The spelling of 100121221011111 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twenty-one million, eleven thousand, one hundred eleven".