20111201243 has 8 divisors (see below), whose sum is σ = 23207378688. Its totient is φ = 17070810984.

The previous prime is 20111201221. The next prime is 20111201249. The reversal of 20111201243 is 34210211102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20111201243 - 2⁸ = 20111200987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111201249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13946021 + ... + 13947462.

It is an arithmetic number, because the mean of its divisors is an integer number (2900922336).

Almost surely, 2^20111201243 is an apocalyptic number.

20111201243 is a deficient number, since it is larger than the sum of its proper divisors (3096177445).

20111201243 is a wasteful number, since it uses less digits than its factorization.

20111201243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27893593.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20111201243 its reverse (34210211102), we get a palindrome (54321412345).

The spelling of 20111201243 in words is "twenty billion, one hundred eleven million, two hundred one thousand, two hundred forty-three".