2111402143 has 4 divisors (see below), whose sum is σ = 2147188680. Its totient is φ = 2075615608.

The previous prime is 2111402131. The next prime is 2111402149. The reversal of 2111402143 is 3412041112.

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 2111402143 - 2²⁵ = 2077847711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2111402143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111402149) 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, 17893180 + ... + 17893297.

It is an arithmetic number, because the mean of its divisors is an integer number (536797170).

Almost surely, 2^2111402143 is an apocalyptic number.

2111402143 is a deficient number, since it is larger than the sum of its proper divisors (35786537).

2111402143 is an equidigital number, since it uses as much as digits as its factorization.

2111402143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35786536.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2111402143 is about 45949.9961153426. The cubic root of 2111402143 is about 1282.8926570092.

Adding to 2111402143 its reverse (3412041112), we get a palindrome (5523443255).

The spelling of 2111402143 in words is "two billion, one hundred eleven million, four hundred two thousand, one hundred forty-three".