20213122122 has 48 divisors (see below), whose sum is σ = 44451763200. Its totient is φ = 6637356000.

The previous prime is 20213122103. The next prime is 20213122123. The reversal of 20213122122 is 22122131202.

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 = 20213122095 and 20213122104.

It is not an unprimeable number, because it can be changed into a prime (20213122123) 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, 333847 + ... + 389717.

It is an arithmetic number, because the mean of its divisors is an integer number (926078400).

Almost surely, 2^20213122122 is an apocalyptic number.

20213122122 is an abundant number, since it is smaller than the sum of its proper divisors (24238641078).

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

20213122122 is a wasteful number, since it uses less digits than its factorization.

20213122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56179 (or 56176 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20213122122 its reverse (22122131202), we get a palindrome (42335253324).

The spelling of 20213122122 in words is "twenty billion, two hundred thirteen million, one hundred twenty-two thousand, one hundred twenty-two".