20102221212120 has 80 divisors (see below), whose sum is σ = 67565799084960. Its totient is φ = 5360592322368.

The previous prime is 20102221212109. The next prime is 20102221212133. The reversal of 20102221212120 is 2121212220102.

It is a happy number.

20102221212120 is a `hidden beast` number, since 201 + 0 + 222 + 121 + 2 + 120 = 666.

It is a super-2 number, since 2×20102221212120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20102221212093 and 20102221212102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3102191392 + ... + 3102197871.

It is an arithmetic number, because the mean of its divisors is an integer number (844572488562).

Almost surely, 2^{20102221212120} is an apocalyptic number.

20102221212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102221212120 is an abundant number, since it is smaller than the sum of its proper divisors (47463577872840).

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

20102221212120 is a wasteful number, since it uses less digits than its factorization.

20102221212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6204389286 (or 6204389273 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20102221212120 its reverse (2121212220102), we get a palindrome (22223433432222).

The spelling of 20102221212120 in words is "twenty trillion, one hundred two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty".