121102110221111 has 16 divisors (see below), whose sum is σ = 126067833036288. Its totient is φ = 116244801002400.

The previous prime is 121102110221083. The next prime is 121102110221171. The reversal of 121102110221111 is 111122011201121.

It is a cyclic number.

It is not a de Polignac number, because 121102110221111 - 2²⁶ = 121102043112247 is a prime.

It is a super-4 number, since 4×121102110221111⁴ (a number of 57 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121102110221111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102110221171) 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, 62823176 + ... + 64722141.

It is an arithmetic number, because the mean of its divisors is an integer number (7879239564768).

Almost surely, 2^{121102110221111} is an apocalyptic number.

121102110221111 is a deficient number, since it is larger than the sum of its proper divisors (4965722815177).

121102110221111 is a wasteful number, since it uses less digits than its factorization.

121102110221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127545742.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121102110221111 its reverse (111122011201121), we get a palindrome (232224121422232).

The spelling of 121102110221111 in words is "one hundred twenty-one trillion, one hundred two billion, one hundred ten million, two hundred twenty-one thousand, one hundred eleven".