121002122111 has 32 divisors (see below), whose sum is σ = 136132254720. Its totient is φ = 106829049600.

The previous prime is 121002122093. The next prime is 121002122123. The reversal of 121002122111 is 111221200121.

It is not a de Polignac number, because 121002122111 - 2¹⁰ = 121002121087 is a prime.

It is a super-3 number, since 3×121002122111³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002122161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6764966 + ... + 6782828.

It is an arithmetic number, because the mean of its divisors is an integer number (4254132960).

Almost surely, 2^121002122111 is an apocalyptic number.

121002122111 is a deficient number, since it is larger than the sum of its proper divisors (15130132609).

121002122111 is a wasteful number, since it uses less digits than its factorization.

121002122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18167.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121002122111 its reverse (111221200121), we get a palindrome (232223322232).

The spelling of 121002122111 in words is "one hundred twenty-one billion, two million, one hundred twenty-two thousand, one hundred eleven".