201123730 has 32 divisors (see below), whose sum is σ = 382579200. Its totient is φ = 75970752.

The previous prime is 201123701. The next prime is 201123731. The reversal of 201123730 is 37321102.

It is a super-2 number, since 2×201123730² = 80901509538225800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201123698 and 201123707.

It is not an unprimeable number, because it can be changed into a prime (201123731) 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, 12636 + ... + 23704.

It is an arithmetic number, because the mean of its divisors is an integer number (11955600).

Almost surely, 2^201123730 is an apocalyptic number.

201123730 is a deficient number, since it is larger than the sum of its proper divisors (181455470).

201123730 is a wasteful number, since it uses less digits than its factorization.

201123730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11178.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 201123730 is about 14181.8098280861. The cubic root of 201123730 is about 585.8967715287.

Adding to 201123730 its reverse (37321102), we get a palindrome (238444832).

The spelling of 201123730 in words is "two hundred one million, one hundred twenty-three thousand, seven hundred thirty".