20101212220120 has 64 divisors (see below), whose sum is σ = 46207409169600. Its totient is φ = 7868181995520.

The previous prime is 20101212220003. The next prime is 20101212220121. The reversal of 20101212220120 is 2102221210102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20101212220094 and 20101212220103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101212220121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28759876 + ... + 29450515.

It is an arithmetic number, because the mean of its divisors is an integer number (721990768275).

Almost surely, 2^{20101212220120} is an apocalyptic number.

20101212220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101212220120 is an abundant number, since it is smaller than the sum of its proper divisors (26106196949480).

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

20101212220120 is a wasteful number, since it uses less digits than its factorization.

20101212220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58210588 (or 58210584 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20101212220120 its reverse (2102221210102), we get a palindrome (22203433430222).

The spelling of 20101212220120 in words is "twenty trillion, one hundred one billion, two hundred twelve million, two hundred twenty thousand, one hundred twenty".