20012221021122 has 24 divisors (see below), whose sum is σ = 47301613323120. Its totient is φ = 6064309400280.

The previous prime is 20012221021043. The next prime is 20012221021181. The reversal of 20012221021122 is 22112012221002.

It is a happy number.

20012221021122 is a `hidden beast` number, since 200 + 1 + 22 + 210 + 211 + 22 = 666.

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 = 20012221021095 and 20012221021104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50535911472 + ... + 50535911867.

It is an arithmetic number, because the mean of its divisors is an integer number (1970900555130).

Almost surely, 2^{20012221021122} is an apocalyptic number.

20012221021122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20012221021122 is an abundant number, since it is smaller than the sum of its proper divisors (27289392301998).

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

20012221021122 is a wasteful number, since it uses less digits than its factorization.

20012221021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101071823358 (or 101071823355 counting only the distinct ones).

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

Adding to 20012221021122 its reverse (22112012221002), we get a palindrome (42124233242124).

The spelling of 20012221021122 in words is "twenty trillion, twelve billion, two hundred twenty-one million, twenty-one thousand, one hundred twenty-two".