20212122202120 has 32 divisors (see below), whose sum is σ = 45478557869400. Its totient is φ = 8084620807168.

The previous prime is 20212122202109. The next prime is 20212122202243. The reversal of 20212122202120 is 2120222121202.

It can be written as a sum of positive squares in 4 ways, for example, as 19382059080036 + 830063122084 = 4402506^2 + 911078^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5688055 + ... + 8531014.

Almost surely, 2^{20212122202120} is an apocalyptic number.

20212122202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212122202120 is an abundant number, since it is smaller than the sum of its proper divisors (25266435667280).

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

20212122202120 is a wasteful number, since it uses less digits than its factorization.

20212122202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14254617 (or 14254613 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20212122202120 its reverse (2120222121202), we get a palindrome (22332344323322).

The spelling of 20212122202120 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-two million, two hundred two thousand, one hundred twenty".