2223131421 has 36 divisors (see below), whose sum is σ = 3544154208. Its totient is φ = 1235914848.

The previous prime is 2223131413. The next prime is 2223131431. The reversal of 2223131421 is 1241313222.

It is not a de Polignac number, because 2223131421 - 2³ = 2223131413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223131411) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 195720 + ... + 206766.

It is an arithmetic number, because the mean of its divisors is an integer number (98448728).

Almost surely, 2^2223131421 is an apocalyptic number.

2223131421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2223131421 is a deficient number, since it is larger than the sum of its proper divisors (1321022787).

2223131421 is a wasteful number, since it uses less digits than its factorization.

2223131421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11138 (or 11094 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 2223131421 is about 47150.0946022381. The cubic root of 2223131421 is about 1305.1338257674.

Adding to 2223131421 its reverse (1241313222), we get a palindrome (3464444643).

The spelling of 2223131421 in words is "two billion, two hundred twenty-three million, one hundred thirty-one thousand, four hundred twenty-one".