121100100222111 has 16 divisors (see below), whose sum is σ = 171521736148224. Its totient is φ = 75736870487424.

The previous prime is 121100100222103. The next prime is 121100100222121. The reversal of 121100100222111 is 111222001001121.

It is a happy number.

It is not a de Polignac number, because 121100100222111 - 2³ = 121100100222103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100100222121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3867267355 + ... + 3867298668.

It is an arithmetic number, because the mean of its divisors is an integer number (10720108509264).

Almost surely, 2^{121100100222111} is an apocalyptic number.

121100100222111 is a deficient number, since it is larger than the sum of its proper divisors (50421635926113).

121100100222111 is a wasteful number, since it uses less digits than its factorization.

121100100222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7734566350.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121100100222111 its reverse (111222001001121), we get a palindrome (232322101223232).

The spelling of 121100100222111 in words is "one hundred twenty-one trillion, one hundred billion, one hundred million, two hundred twenty-two thousand, one hundred eleven".