10121212111320 has 192 divisors, whose sum is σ = 34727952636000. Its totient is φ = 2549349863424.

The previous prime is 10121212111289. The next prime is 10121212111363. The reversal of 10121212111320 is 2311121212101.

It is a happy number.

10121212111320 is a `hidden beast` number, since 1 + 0 + 1 + 21 + 212 + 111 + 320 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 10121212111293 and 10121212111302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109666 + ... + 4500494.

Almost surely, 2^{10121212111320} is an apocalyptic number.

10121212111320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10121212111320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17363976318000).

10121212111320 is an abundant number, since it is smaller than the sum of its proper divisors (24606740524680).

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

10121212111320 is a wasteful number, since it uses less digits than its factorization.

10121212111320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4391202 (or 4391195 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 10121212111320 its reverse (2311121212101), we get a palindrome (12432333323421).

The spelling of 10121212111320 in words is "ten trillion, one hundred twenty-one billion, two hundred twelve million, one hundred eleven thousand, three hundred twenty".