1011111243 has 8 divisors (see below), whose sum is σ = 1356735888. Its totient is φ = 669780384.

The previous prime is 1011111203. The next prime is 1011111253. The reversal of 1011111243 is 3421111101.

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

It is not a de Polignac number, because 1011111243 - 2²¹ = 1009014091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011111203) 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, 1072896 + ... + 1073837.

It is an arithmetic number, because the mean of its divisors is an integer number (169591986).

Almost surely, 2^1011111243 is an apocalyptic number.

1011111243 is a deficient number, since it is larger than the sum of its proper divisors (345624645).

1011111243 is a wasteful number, since it uses less digits than its factorization.

1011111243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146893.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 1011111243 is about 31797.9754544216. The cubic root of 1011111243 is about 1003.6901139762.

Adding to 1011111243 its reverse (3421111101), we get a palindrome (4432222344).

The spelling of 1011111243 in words is "one billion, eleven million, one hundred eleven thousand, two hundred forty-three".