10421220 has 24 divisors (see below), whose sum is σ = 29179584. Its totient is φ = 2778976.

The previous prime is 10421207. The next prime is 10421233. The reversal of 10421220 is 2212401.

10421220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (10421207) and next prime (10421233).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 10421196 and 10421205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86784 + ... + 86903.

It is an arithmetic number, because the mean of its divisors is an integer number (1215816).

Almost surely, 2^10421220 is an apocalyptic number.

10421220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10421220 is an abundant number, since it is smaller than the sum of its proper divisors (18758364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10421220 is a wasteful number, since it uses less digits than its factorization.

10421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173699 (or 173697 counting only the distinct ones).

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

The square root of 10421220 is about 3228.1914441371. The cubic root of 10421220 is about 218.4269331730.

Adding to 10421220 its reverse (2212401), we get a palindrome (12633621).

The spelling of 10421220 in words is "ten million, four hundred twenty-one thousand, two hundred twenty".