2201021243421 has 64 divisors (see below), whose sum is σ = 4046784301056. Its totient is φ = 1026909446400.

The previous prime is 2201021243357. The next prime is 2201021243461. The reversal of 2201021243421 is 1243421201022.

It is not a de Polignac number, because 2201021243421 - 2⁶ = 2201021243357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2201021243391 and 2201021243400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201021243461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9793495 + ... + 10015716.

It is an arithmetic number, because the mean of its divisors is an integer number (63231004704).

Almost surely, 2^{2201021243421} is an apocalyptic number.

2201021243421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2201021243421 is a deficient number, since it is larger than the sum of its proper divisors (1845763057635).

2201021243421 is a wasteful number, since it uses less digits than its factorization.

2201021243421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19809282.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 2201021243421 its reverse (1243421201022), we get a palindrome (3444442444443).

It can be divided in two parts, 2201021 and 243421, that added together give a palindrome (2444442).

The spelling of 2201021243421 in words is "two trillion, two hundred one billion, twenty-one million, two hundred forty-three thousand, four hundred twenty-one".