2043642101 has 4 divisors (see below), whose sum is σ = 2043739104. Its totient is φ = 2043545100.

The previous prime is 2043642091. The next prime is 2043642121. The reversal of 2043642101 is 1012463402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1012463402 = 2 ⋅506231701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2043642101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043642121) 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, 2105 + ... + 63966.

It is an arithmetic number, because the mean of its divisors is an integer number (510934776).

Almost surely, 2^2043642101 is an apocalyptic number.

It is an amenable number.

2043642101 is a deficient number, since it is larger than the sum of its proper divisors (97003).

2043642101 is an equidigital number, since it uses as much as digits as its factorization.

2043642101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97002.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 2043642101 is about 45206.6599186447. The cubic root of 2043642101 is about 1269.0194553807.

The spelling of 2043642101 in words is "two billion, forty-three million, six hundred forty-two thousand, one hundred one".