2231001421 has 4 divisors (see below), whose sum is σ = 2433819744. Its totient is φ = 2028183100.

The previous prime is 2231001391. The next prime is 2231001431. The reversal of 2231001421 is 1241001322.

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-2231001421 is a prime.

It is a super-3 number, since 3×2231001421³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2231001395 and 2231001404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231001431) 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, 101409145 + ... + 101409166.

It is an arithmetic number, because the mean of its divisors is an integer number (608454936).

Almost surely, 2^2231001421 is an apocalyptic number.

It is an amenable number.

2231001421 is a deficient number, since it is larger than the sum of its proper divisors (202818323).

2231001421 is a wasteful number, since it uses less digits than its factorization.

2231001421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202818322.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2231001421 is about 47233.4777567776. The cubic root of 2231001421 is about 1306.6720923854.

Adding to 2231001421 its reverse (1241001322), we get a palindrome (3472002743).

Subtracting from 2231001421 its reverse (1241001322), we obtain a palindrome (990000099).

The spelling of 2231001421 in words is "two billion, two hundred thirty-one million, one thousand, four hundred twenty-one".