10220421 has 8 divisors (see below), whose sum is σ = 14066944. Its totient is φ = 6593760.

The previous prime is 10220411. The next prime is 10220429. The reversal of 10220421 is 12402201.

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

It is a de Polignac number, because none of the positive numbers 2^k-10220421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10220397 and 10220406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10220429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54856 + ... + 55041.

It is an arithmetic number, because the mean of its divisors is an integer number (1758368).

Almost surely, 2^10220421 is an apocalyptic number.

It is an amenable number.

10220421 is a deficient number, since it is larger than the sum of its proper divisors (3846523).

10220421 is a wasteful number, since it uses less digits than its factorization.

10220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109931.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 10220421 is about 3196.9393175348. The cubic root of 10220421 is about 217.0149210719.

Adding to 10220421 its reverse (12402201), we get a palindrome (22622622).

The spelling of 10220421 in words is "ten million, two hundred twenty thousand, four hundred twenty-one".