20112022121220 has 72 divisors (see below), whose sum is σ = 63110138396760. Its totient is φ = 5178267763200.

The previous prime is 20112022121161. The next prime is 20112022121221. The reversal of 20112022121220 is 2212122021102.

It is a happy number.

20112022121220 is a `hidden beast` number, since 20 + 11 + 202 + 212 + 1 + 220 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 748290741444 + 19363731379776 = 865038^2 + 4400424^2 .

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 = 20112022121193 and 20112022121202.

It is not an unprimeable number, because it can be changed into a prime (20112022121221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1926433681 + ... + 1926444120.

It is an arithmetic number, because the mean of its divisors is an integer number (876529699955).

Almost surely, 2^{20112022121220} is an apocalyptic number.

20112022121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112022121220 is an abundant number, since it is smaller than the sum of its proper divisors (42998116275540).

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

20112022121220 is a wasteful number, since it uses less digits than its factorization.

20112022121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3852877845 (or 3852877840 counting only the distinct ones).

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

Adding to 20112022121220 its reverse (2212122021102), we get a palindrome (22324144142322).

The spelling of 20112022121220 in words is "twenty trillion, one hundred twelve billion, twenty-two million, one hundred twenty-one thousand, two hundred twenty".