201123310340 has 24 divisors (see below), whose sum is σ = 422492363160. Its totient is φ = 80423912448.

The previous prime is 201123310261. The next prime is 201123310379. The reversal of 201123310340 is 43013321102.

It can be written as a sum of positive squares in 4 ways, for example, as 2922051136 + 198201259204 = 54056^2 + 445198^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1523267 + ... + 1650026.

It is an arithmetic number, because the mean of its divisors is an integer number (17603848465).

Almost surely, 2^201123310340 is an apocalyptic number.

201123310340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201123310340 is an abundant number, since it is smaller than the sum of its proper divisors (221369052820).

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

201123310340 is a wasteful number, since it uses less digits than its factorization.

201123310340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176471 (or 3176469 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 201123310340 its reverse (43013321102), we get a palindrome (244136631442).

The spelling of 201123310340 in words is "two hundred one billion, one hundred twenty-three million, three hundred ten thousand, three hundred forty".