12121351110 has 160 divisors (see below), whose sum is σ = 36424279584. Its totient is φ = 2866752000.

The previous prime is 12121351079. The next prime is 12121351117. The reversal of 12121351110 is 1115312121.

12121351110 is a `hidden beast` number, since 121 + 21 + 3 + 511 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121351117) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 348720 + ... + 381900.

Almost surely, 2^12121351110 is an apocalyptic number.

12121351110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121351110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18212139792).

12121351110 is an abundant number, since it is smaller than the sum of its proper divisors (24302928474).

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

12121351110 is a wasteful number, since it uses less digits than its factorization.

12121351110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33252 (or 33243 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

Adding to 12121351110 its reverse (1115312121), we get a palindrome (13236663231).

The spelling of 12121351110 in words is "twelve billion, one hundred twenty-one million, three hundred fifty-one thousand, one hundred ten".