201021120510 has 32 divisors (see below), whose sum is σ = 551372216832. Its totient is φ = 45947684640.

The previous prime is 201021120427. The next prime is 201021120511. The reversal of 201021120510 is 15021120102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 201021120510.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021120511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478621506 + ... + 478621925.

It is an arithmetic number, because the mean of its divisors is an integer number (17230381776).

Almost surely, 2^201021120510 is an apocalyptic number.

201021120510 is an abundant number, since it is smaller than the sum of its proper divisors (350351096322).

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

201021120510 is a wasteful number, since it uses less digits than its factorization.

201021120510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957243448.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 201021120510 its reverse (15021120102), we get a palindrome (216042240612).

The spelling of 201021120510 in words is "two hundred one billion, twenty-one million, one hundred twenty thousand, five hundred ten".