2051011042 has 4 divisors (see below), whose sum is σ = 3076516566. Its totient is φ = 1025505520.

The previous prime is 2051011021. The next prime is 2051011049. The reversal of 2051011042 is 2401101502.

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

It can be written as a sum of positive squares in only one way, i.e., 1153349521 + 897661521 = 33961^2 + 29961^2 .

It is not an unprimeable number, because it can be changed into a prime (2051011049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512752759 + ... + 512752762.

Almost surely, 2^2051011042 is an apocalyptic number.

2051011042 is a deficient number, since it is larger than the sum of its proper divisors (1025505524).

2051011042 is a wasteful number, since it uses less digits than its factorization.

2051011042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025505523.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2051011042 is about 45288.0894054938. The cubic root of 2051011042 is about 1270.5428976561.

Adding to 2051011042 its reverse (2401101502), we get a palindrome (4452112544).

The spelling of 2051011042 in words is "two billion, fifty-one million, eleven thousand, forty-two".