201102520290 has 128 divisors (see below), whose sum is σ = 553747138560. Its totient is φ = 45787327488.

The previous prime is 201102520237. The next prime is 201102520291. The reversal of 201102520290 is 92025201102.

It is a self number, because there is not a number n which added to its sum of digits gives 201102520290.

It is not an unprimeable number, because it can be changed into a prime (201102520291) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 123602457 + ... + 123604083.

It is an arithmetic number, because the mean of its divisors is an integer number (4326149520).

Almost surely, 2^201102520290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201102520290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276873569280).

201102520290 is an abundant number, since it is smaller than the sum of its proper divisors (352644618270).

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

201102520290 is a wasteful number, since it uses less digits than its factorization.

201102520290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 201102520290 its reverse (92025201102), we get a palindrome (293127721392).

The spelling of 201102520290 in words is "two hundred one billion, one hundred two million, five hundred twenty thousand, two hundred ninety".