20102212111020 has 192 divisors, whose sum is σ = 61913437157376. Its totient is φ = 4842342190080.

The previous prime is 20102212110941. The next prime is 20102212111021. The reversal of 20102212111020 is 2011121220102.

It is a super-3 number, since 3×20102212111020³ (a number of 41 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (20102212111021) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 333245902 + ... + 333306218.

It is an arithmetic number, because the mean of its divisors is an integer number (322465818528).

Almost surely, 2^{20102212111020} is an apocalyptic number.

20102212111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20102212111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30956718578688).

20102212111020 is an abundant number, since it is smaller than the sum of its proper divisors (41811225046356).

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

20102212111020 is a wasteful number, since it uses less digits than its factorization.

20102212111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69480 (or 69478 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20102212111020 its reverse (2011121220102), we get a palindrome (22113333331122).

The spelling of 20102212111020 in words is "twenty trillion, one hundred two billion, two hundred twelve million, one hundred eleven thousand, twenty".