421204431021140 has 24 divisors (see below), whose sum is σ = 952570020925320. Its totient is φ = 155521636069248.

The previous prime is 421204431021139. The next prime is 421204431021161. The reversal of 421204431021140 is 41120134402124.

It can be written as a sum of positive squares in 4 ways, for example, as 3938343444676 + 417266087576464 = 1984526^2 + 20427092^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810008520935 + ... + 810008521454.

It is an arithmetic number, because the mean of its divisors is an integer number (39690417538555).

Almost surely, 2^{421204431021140} is an apocalyptic number.

It is an amenable number.

421204431021140 is an abundant number, since it is smaller than the sum of its proper divisors (531365589904180).

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

421204431021140 is a wasteful number, since it uses less digits than its factorization.

421204431021140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620017042411 (or 1620017042409 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 421204431021140 its reverse (41120134402124), we get a palindrome (462324565423264).

The spelling of 421204431021140 in words is "four hundred twenty-one trillion, two hundred four billion, four hundred thirty-one million, twenty-one thousand, one hundred forty".