2102002231421 has 4 divisors (see below), whose sum is σ = 2107857391200. Its totient is φ = 2096147071644.

The previous prime is 2102002231367. The next prime is 2102002231423. The reversal of 2102002231421 is 1241322002012.

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 a de Polignac number, because none of the positive numbers 2^k-2102002231421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102002231393 and 2102002231402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102002231423) 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, 2927579351 + ... + 2927580068.

It is an arithmetic number, because the mean of its divisors is an integer number (526964347800).

Almost surely, 2^{2102002231421} is an apocalyptic number.

It is an amenable number.

2102002231421 is a deficient number, since it is larger than the sum of its proper divisors (5855159779).

2102002231421 is an equidigital number, since it uses as much as digits as its factorization.

2102002231421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5855159778.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 2102002231421 its reverse (1241322002012), we get a palindrome (3343324233433).

The spelling of 2102002231421 in words is "two trillion, one hundred two billion, two million, two hundred thirty-one thousand, four hundred twenty-one".