20020135122 has 60 divisors (see below), whose sum is σ = 48576206250. Its totient is φ = 6160033152.

The previous prime is 20020135117. The next prime is 20020135133. The reversal of 20020135122 is 22153102002.

It can be written as a sum of positive squares in 3 ways, for example, as 10235166561 + 9784968561 = 101169^2 + 98919^2 .

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 = 20020135095 and 20020135104.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 338247 + ... + 393002.

Almost surely, 2^20020135122 is an apocalyptic number.

20020135122 is an abundant number, since it is smaller than the sum of its proper divisors (28556071128).

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

20020135122 is a wasteful number, since it uses less digits than its factorization.

20020135122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731289 (or 731267 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 20020135122 its reverse (22153102002), we get a palindrome (42173237124).

The spelling of 20020135122 in words is "twenty billion, twenty million, one hundred thirty-five thousand, one hundred twenty-two".