431203102222421 has 4 divisors (see below), whose sum is σ = 431204121361644. Its totient is φ = 431202083083200.

The previous prime is 431203102222397. The next prime is 431203102222471. The reversal of 431203102222421 is 124222201302134.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 116474710599025 + 314728391623396 = 10792345^2 + 17740586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431203102222421 is a prime.

It is a super-2 number, since 2×431203102222421² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431203102222471) 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, 508934690 + ... + 509781251.

It is an arithmetic number, because the mean of its divisors is an integer number (107801030340411).

Almost surely, 2^{431203102222421} is an apocalyptic number.

It is an amenable number.

431203102222421 is a deficient number, since it is larger than the sum of its proper divisors (1019139223).

431203102222421 is a wasteful number, since it uses less digits than its factorization.

431203102222421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019139222.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 431203102222421 its reverse (124222201302134), we get a palindrome (555425303524555).

The spelling of 431203102222421 in words is "four hundred thirty-one trillion, two hundred three billion, one hundred two million, two hundred twenty-two thousand, four hundred twenty-one".