10111121210220 has 24 divisors (see below), whose sum is σ = 28311139388784. Its totient is φ = 2696298989376.

The previous prime is 10111121210143. The next prime is 10111121210221. The reversal of 10111121210220 is 2201212111101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 10111121210220.

It is not an unprimeable number, because it can be changed into a prime (10111121210221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84259343359 + ... + 84259343478.

It is an arithmetic number, because the mean of its divisors is an integer number (1179630807866).

Almost surely, 2^{10111121210220} is an apocalyptic number.

10111121210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10111121210220 is an abundant number, since it is smaller than the sum of its proper divisors (18200018178564).

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

10111121210220 is a wasteful number, since it uses less digits than its factorization.

10111121210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168518686849 (or 168518686847 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10111121210220 its reverse (2201212111101), we get a palindrome (12312333321321).

The spelling of 10111121210220 in words is "ten trillion, one hundred eleven billion, one hundred twenty-one million, two hundred ten thousand, two hundred twenty".