2104420042021 has 4 divisors (see below), whose sum is σ = 2295730954944. Its totient is φ = 1913109129100.

The previous prime is 2104420041991. The next prime is 2104420042051. The reversal of 2104420042021 is 1202400244012.

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.

It is an interprime number because it is at equal distance from previous prime (2104420041991) and next prime (2104420042051).

It is a cyclic number.

It is not a de Polignac number, because 2104420042021 - 2⁹ = 2104420041509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2104420041983 and 2104420042001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104420042051) 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, 95655456445 + ... + 95655456466.

It is an arithmetic number, because the mean of its divisors is an integer number (573932738736).

Almost surely, 2^{2104420042021} is an apocalyptic number.

It is an amenable number.

2104420042021 is a deficient number, since it is larger than the sum of its proper divisors (191310912923).

2104420042021 is a wasteful number, since it uses less digits than its factorization.

2104420042021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191310912922.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 2104420042021 its reverse (1202400244012), we get a palindrome (3306820286033).

The spelling of 2104420042021 in words is "two trillion, one hundred four billion, four hundred twenty million, forty-two thousand, twenty-one".