12121121111110 has 256 divisors, whose sum is σ = 26221478215680. Its totient is φ = 3985208640000.

The previous prime is 12121121111093. The next prime is 12121121111117. The reversal of 12121121111110 is 1111112112121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121121111117) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1721013249 + ... + 1721020291.

It is an arithmetic number, because the mean of its divisors is an integer number (102427649280).

Almost surely, 2^{12121121111110} is an apocalyptic number.

12121121111110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121121111110 is an abundant number, since it is smaller than the sum of its proper divisors (14100357104570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121121111110 is a wasteful number, since it uses less digits than its factorization.

12121121111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7475.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 12121121111110 its reverse (1111112112121), we get a palindrome (13232233223231).

The spelling of 12121121111110 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred ten".