2021103442 has 4 divisors (see below), whose sum is σ = 3031655166. Its totient is φ = 1010551720.

The previous prime is 2021103421. The next prime is 2021103443. The reversal of 2021103442 is 2443011202.

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., 1338901281 + 682202161 = 36591^2 + 26119^2 .

It is not an unprimeable number, because it can be changed into a prime (2021103443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505275859 + ... + 505275862.

Almost surely, 2^2021103442 is an apocalyptic number.

2021103442 is a deficient number, since it is larger than the sum of its proper divisors (1010551724).

2021103442 is a wasteful number, since it uses less digits than its factorization.

2021103442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010551723.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2021103442 is about 44956.6840636629. The cubic root of 2021103442 is about 1264.3369993019.

Adding to 2021103442 its reverse (2443011202), we get a palindrome (4464114644).

The spelling of 2021103442 in words is "two billion, twenty-one million, one hundred three thousand, four hundred forty-two".