20021122122 has 16 divisors (see below), whose sum is σ = 42397670592.
Its totient is φ = 6281136320.
The previous prime is 20021122097. The next prime is 20021122157. The reversal of 20021122122 is 22122112002.
Adding to 20021122122 its reverse (22122112002), we get a palindrome (42143234124).
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98142654 + ... + 98142857.
It is an arithmetic number, because the mean of its divisors is an integer number (2649854412).
Almost surely, 220021122122 is an apocalyptic number.
20021122122 is an abundant number, since it is smaller than the sum of its proper divisors (22376548470).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20021122122 is a wasteful number, since it uses less digits than its factorization.
20021122122 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 196285533.
The product of its (nonzero) digits is 64, while the sum is 15.
The spelling of 20021122122 in words is "twenty billion, twenty-one million, one hundred twenty-two thousand, one hundred twenty-two".