1421140443220 has 72 divisors (see below), whose sum is σ = 3170997952920. Its totient is φ = 534895441920.

The previous prime is 1421140443181. The next prime is 1421140443221. The reversal of 1421140443220 is 223440411241.

It can be written as a sum of positive squares in 12 ways, for example, as 92151102096 + 1328989341124 = 303564^2 + 1152818^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421140443221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27654750 + ... + 27706090.

It is an arithmetic number, because the mean of its divisors is an integer number (44041638235).

Almost surely, 2^{1421140443220} is an apocalyptic number.

1421140443220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421140443220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585498976460).

1421140443220 is an abundant number, since it is smaller than the sum of its proper divisors (1749857509700).

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

1421140443220 is a wasteful number, since it uses less digits than its factorization.

1421140443220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56173 (or 56154 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 1421140443220 its reverse (223440411241), we get a palindrome (1644580854461).

The spelling of 1421140443220 in words is "one trillion, four hundred twenty-one billion, one hundred forty million, four hundred forty-three thousand, two hundred twenty".