431121021202 has 16 divisors (see below), whose sum is σ = 653976073080. Its totient is φ = 213129207808.

The previous prime is 431121021187. The next prime is 431121021203. The reversal of 431121021202 is 202120121134.

It can be written as a sum of positive squares in 4 ways, for example, as 409240398961 + 21880622241 = 639719^2 + 147921^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 431121021202.

It is not an unprimeable number, because it can be changed into a prime (431121021203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5990778 + ... + 6062314.

Almost surely, 2^431121021202 is an apocalyptic number.

431121021202 is a deficient number, since it is larger than the sum of its proper divisors (222855051878).

431121021202 is a wasteful number, since it uses less digits than its factorization.

431121021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105485.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 431121021202 its reverse (202120121134), we get a palindrome (633241142336).

The spelling of 431121021202 in words is "four hundred thirty-one billion, one hundred twenty-one million, twenty-one thousand, two hundred two".