10212220 has 12 divisors (see below), whose sum is σ = 21445704. Its totient is φ = 4084880.

The previous prime is 10212203. The next prime is 10212233. The reversal of 10212220 is 2221201.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10212197 and 10212206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255286 + ... + 255325.

It is an arithmetic number, because the mean of its divisors is an integer number (1787142).

Almost surely, 2^10212220 is an apocalyptic number.

10212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10212220 is an abundant number, since it is smaller than the sum of its proper divisors (11233484).

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

10212220 is a wasteful number, since it uses less digits than its factorization.

10212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510620 (or 510618 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 10212220 is about 3195.6564270897. The cubic root of 10212220 is about 216.9568603322.

Adding to 10212220 its reverse (2221201), we get a palindrome (12433421).

The spelling of 10212220 in words is "ten million, two hundred twelve thousand, two hundred twenty".