10111020121220 has 48 divisors (see below), whose sum is σ = 21444509032128. Its totient is φ = 4004344586880.

The previous prime is 10111020121207. The next prime is 10111020121243. The reversal of 10111020121220 is 2212102011101.

It is a junction number, because it is equal to n+sod(n) for n = 10111020121195 and 10111020121204.

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 15 ways as a sum of consecutive naturals, for example, 5330462 + ... + 6973941.

It is an arithmetic number, because the mean of its divisors is an integer number (446760604836).

Almost surely, 2^{10111020121220} is an apocalyptic number.

10111020121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10111020121220 is an abundant number, since it is smaller than the sum of its proper divisors (11333488910908).

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

10111020121220 is a wasteful number, since it uses less digits than its factorization.

10111020121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12304820 (or 12304818 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10111020121220 its reverse (2212102011101), we get a palindrome (12323122132321).

The spelling of 10111020121220 in words is "ten trillion, one hundred eleven billion, twenty million, one hundred twenty-one thousand, two hundred twenty".