201020401134 has 96 divisors (see below), whose sum is σ = 519772010400. Its totient is φ = 57420316800.

The previous prime is 201020401091. The next prime is 201020401157. The reversal of 201020401134 is 431104020102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15946434 + ... + 15959034.

It is an arithmetic number, because the mean of its divisors is an integer number (5414291775).

Almost surely, 2^201020401134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201020401134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259886005200).

201020401134 is an abundant number, since it is smaller than the sum of its proper divisors (318751609266).

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

201020401134 is a wasteful number, since it uses less digits than its factorization.

201020401134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18655 (or 18642 counting only the distinct ones).

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

Adding to 201020401134 its reverse (431104020102), we get a palindrome (632124421236).

The spelling of 201020401134 in words is "two hundred one billion, twenty million, four hundred one thousand, one hundred thirty-four".