201122400042 has 24 divisors (see below), whose sum is σ = 443151053280. Its totient is φ = 65904514920.

The previous prime is 201122400019. The next prime is 201122400077. The reversal of 201122400042 is 240004221102.

201122400042 is a `hidden beast` number, since 201 + 1 + 22 + 400 + 0 + 42 = 666.

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 = 201122399988 and 201122400024.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94689334 + ... + 94691457.

It is an arithmetic number, because the mean of its divisors is an integer number (18464627220).

Almost surely, 2^201122400042 is an apocalyptic number.

201122400042 is an abundant number, since it is smaller than the sum of its proper divisors (242028653238).

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

201122400042 is a wasteful number, since it uses less digits than its factorization.

201122400042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189380858 (or 189380855 counting only the distinct ones).

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

Adding to 201122400042 its reverse (240004221102), we get a palindrome (441126621144).

The spelling of 201122400042 in words is "two hundred one billion, one hundred twenty-two million, four hundred thousand, forty-two".