11111020143 has 4 divisors (see below), whose sum is σ = 14814693528. Its totient is φ = 7407346760.

The previous prime is 11111020139. The next prime is 11111020163. The reversal of 11111020143 is 34102011111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11111020143 - 2² = 11111020139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111020163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851836688 + ... + 1851836693.

It is an arithmetic number, because the mean of its divisors is an integer number (3703673382).

Almost surely, 2^11111020143 is an apocalyptic number.

11111020143 is a deficient number, since it is larger than the sum of its proper divisors (3703673385).

11111020143 is an equidigital number, since it uses as much as digits as its factorization.

11111020143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703673384.

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

Adding to 11111020143 its reverse (34102011111), we get a palindrome (45213031254).

The spelling of 11111020143 in words is "eleven billion, one hundred eleven million, twenty thousand, one hundred forty-three".