1421431004421 has 6 divisors (see below), whose sum is σ = 2053178117510. Its totient is φ = 947620669608.

The previous prime is 1421431004417. The next prime is 1421431004429. The reversal of 1421431004421 is 1244001341241.

1421431004421 is a `hidden beast` number, since 1 + 4 + 214 + 3 + 1 + 0 + 0 + 442 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1279249219521 + 142181784900 = 1131039^2 + 377070^2 .

It is not a de Polignac number, because 1421431004421 - 2² = 1421431004417 is a prime.

It is a super-2 number, since 2×1421431004421² (a number of 25 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 (1421431004429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78968389126 + ... + 78968389143.

Almost surely, 2^{1421431004421} is an apocalyptic number.

It is an amenable number.

1421431004421 is a deficient number, since it is larger than the sum of its proper divisors (631747113089).

1421431004421 is a wasteful number, since it uses less digits than its factorization.

1421431004421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157936778275 (or 157936778272 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 1421431004421 its reverse (1244001341241), we get a palindrome (2665432345662).

The spelling of 1421431004421 in words is "one trillion, four hundred twenty-one billion, four hundred thirty-one million, four thousand, four hundred twenty-one".