10211421 has 8 divisors (see below), whose sum is σ = 14853024. Its totient is φ = 6188720.

The previous prime is 10211401. The next prime is 10211491. The reversal of 10211421 is 12411201.

It is a happy number.

10211421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10211421 - 2⁵ = 10211389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10211397 and 10211406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154686 + ... + 154751.

It is an arithmetic number, because the mean of its divisors is an integer number (1856628).

Almost surely, 2^10211421 is an apocalyptic number.

10211421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10211421 is a deficient number, since it is larger than the sum of its proper divisors (4641603).

10211421 is a wasteful number, since it uses less digits than its factorization.

10211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309451.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 10211421 is about 3195.5314112053. The cubic root of 10211421 is about 216.9512019787.

Adding to 10211421 its reverse (12411201), we get a palindrome (22622622).

It can be divided in two parts, 1021 and 1421, that added together give a palindrome (2442).

The spelling of 10211421 in words is "ten million, two hundred eleven thousand, four hundred twenty-one".