10012144421 has 6 divisors (see below), whose sum is σ = 10466382150. Its totient is φ = 9576833288.

The previous prime is 10012144393. The next prime is 10012144423. The reversal of 10012144421 is 12444121001.

It can be written as a sum of positive squares in only one way, i.e., 9987004225 + 25140196 = 99935^2 + 5014^2 .

It is not a de Polignac number, because 10012144421 - 2¹⁸ = 10011882277 is a prime.

It is a super-2 number, since 2×10012144421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10012144393 and 10012144402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10012144423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9462746 + ... + 9463803.

It is an arithmetic number, because the mean of its divisors is an integer number (1744397025).

Almost surely, 2^10012144421 is an apocalyptic number.

It is an amenable number.

10012144421 is a deficient number, since it is larger than the sum of its proper divisors (454237729).

10012144421 is an equidigital number, since it uses as much as digits as its factorization.

10012144421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18926595 (or 18926572 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 10012144421 its reverse (12444121001), we get a palindrome (22456265422).

The spelling of 10012144421 in words is "ten billion, twelve million, one hundred forty-four thousand, four hundred twenty-one".