10111212010020 has 288 divisors, whose sum is σ = 33009052535424. Its totient is φ = 2302856990720.

The previous prime is 10111212010019. The next prime is 10111212010049. The reversal of 10111212010020 is 2001021211101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 10111212009978 and 10111212010005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 68671399 + ... + 68818481.

It is an arithmetic number, because the mean of its divisors is an integer number (114614765748).

Almost surely, 2^{10111212010020} is an apocalyptic number.

10111212010020 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 10111212010020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16504526267712).

10111212010020 is an abundant number, since it is smaller than the sum of its proper divisors (22897840525404).

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

10111212010020 is a wasteful number, since it uses less digits than its factorization.

10111212010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147691 (or 147678 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10111212010020 its reverse (2001021211101), we get a palindrome (12112233221121).

The spelling of 10111212010020 in words is "ten trillion, one hundred eleven billion, two hundred twelve million, ten thousand, twenty".