10101220120 has 16 divisors (see below), whose sum is σ = 22727745360. Its totient is φ = 4040488032.

The previous prime is 10101220117. The next prime is 10101220121. The reversal of 10101220120 is 2102210101.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10101220097 and 10101220106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101220121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126265212 + ... + 126265291.

It is an arithmetic number, because the mean of its divisors is an integer number (1420484085).

Almost surely, 2^10101220120 is an apocalyptic number.

10101220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10101220120 is an abundant number, since it is smaller than the sum of its proper divisors (12626525240).

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

10101220120 is a wasteful number, since it uses less digits than its factorization.

10101220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252530514 (or 252530510 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10101220120 its reverse (2102210101), we get a palindrome (12203430221).

The spelling of 10101220120 in words is "ten billion, one hundred one million, two hundred twenty thousand, one hundred twenty".