2111550042 has 48 divisors (see below), whose sum is σ = 5201573760. Its totient is φ = 567810432.

The previous prime is 2111550041. The next prime is 2111550083. The reversal of 2111550042 is 2400551112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2111550041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206242 + ... + 216237.

It is an arithmetic number, because the mean of its divisors is an integer number (108366120).

Almost surely, 2^2111550042 is an apocalyptic number.

2111550042 is an abundant number, since it is smaller than the sum of its proper divisors (3090023718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2111550042 is a wasteful number, since it uses less digits than its factorization.

2111550042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422515 (or 422508 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2111550042 is about 45951.6054344133. The cubic root of 2111550042 is about 1282.9226108974.

The spelling of 2111550042 in words is "two billion, one hundred eleven million, five hundred fifty thousand, forty-two".