20201224122 has 16 divisors (see below), whose sum is σ = 44891609280. Its totient is φ = 6733741356.

The previous prime is 20201224097. The next prime is 20201224123. The reversal of 20201224122 is 22142210202.

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 = 20201224095 and 20201224104.

It is not an unprimeable number, because it can be changed into a prime (20201224123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187048318 + ... + 187048425.

It is an arithmetic number, because the mean of its divisors is an integer number (2805725580).

Almost surely, 2^20201224122 is an apocalyptic number.

20201224122 is an abundant number, since it is smaller than the sum of its proper divisors (24690385158).

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

20201224122 is a wasteful number, since it uses less digits than its factorization.

20201224122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374096754 (or 374096748 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20201224122 its reverse (22142210202), we get a palindrome (42343434324).

The spelling of 20201224122 in words is "twenty billion, two hundred one million, two hundred twenty-four thousand, one hundred twenty-two".