10220621 has 8 divisors (see below), whose sum is σ = 11115000. Its totient is φ = 9358848.

The previous prime is 10220597. The next prime is 10220647. The reversal of 10220621 is 12602201.

It can be written as a sum of positive squares in 4 ways, for example, as 5428900 + 4791721 = 2330^2 + 2189^2 .

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 10220621 - 2¹⁰ = 10219597 is a prime.

It is a super-2 number, since 2×10220621² = 208922187251282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10220596 and 10220605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10220681) 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, 7496 + ... + 8753.

It is an arithmetic number, because the mean of its divisors is an integer number (1389375).

Almost surely, 2^10220621 is an apocalyptic number.

It is an amenable number.

10220621 is a deficient number, since it is larger than the sum of its proper divisors (894379).

10220621 is a wasteful number, since it uses less digits than its factorization.

10220621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16303.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 10220621 is about 3196.9705972999. The cubic root of 10220621 is about 217.0163366268.

Adding to 10220621 its reverse (12602201), we get a palindrome (22822822).

The spelling of 10220621 in words is "ten million, two hundred twenty thousand, six hundred twenty-one".