431401121020 has 24 divisors (see below), whose sum is σ = 907674579504. Its totient is φ = 172230500736.

The previous prime is 431401120999. The next prime is 431401121051. The reversal of 431401121020 is 20121104134.

It is a super-2 number, since 2×431401121020² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20611009 + ... + 20631928.

It is an arithmetic number, because the mean of its divisors is an integer number (37819774146).

Almost surely, 2^431401121020 is an apocalyptic number.

It is an amenable number.

431401121020 is an abundant number, since it is smaller than the sum of its proper divisors (476273458484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431401121020 is a wasteful number, since it uses less digits than its factorization.

431401121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41243469 (or 41243467 counting only the distinct ones).

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

Adding to 431401121020 its reverse (20121104134), we get a palindrome (451522225154).

The spelling of 431401121020 in words is "four hundred thirty-one billion, four hundred one million, one hundred twenty-one thousand, twenty".