2104100402221 has 4 divisors (see below), whose sum is σ = 2105574895872. Its totient is φ = 2102625908572.

The previous prime is 2104100402219. The next prime is 2104100402233. The reversal of 2104100402221 is 1222040014012.

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 a cyclic number.

It is not a de Polignac number, because 2104100402221 - 2¹ = 2104100402219 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 (2104100402291) 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, 737244685 + ... + 737247538.

It is an arithmetic number, because the mean of its divisors is an integer number (526393723968).

Almost surely, 2^{2104100402221} is an apocalyptic number.

It is an amenable number.

2104100402221 is a deficient number, since it is larger than the sum of its proper divisors (1474493651).

2104100402221 is a wasteful number, since it uses less digits than its factorization.

2104100402221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474493650.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2104100402221 its reverse (1222040014012), we get a palindrome (3326140416233).

The spelling of 2104100402221 in words is "two trillion, one hundred four billion, one hundred million, four hundred two thousand, two hundred twenty-one".