10012221 has 32 divisors (see below), whose sum is σ = 16176000. Its totient is φ = 6096384.

The previous prime is 10012217. The next prime is 10012229. The reversal of 10012221 is 12221001.

10012221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10012221 - 2² = 10012217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10012229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14541 + ... + 15213.

It is an arithmetic number, because the mean of its divisors is an integer number (505500).

Almost surely, 2^10012221 is an apocalyptic number.

It is an amenable number.

10012221 is a deficient number, since it is larger than the sum of its proper divisors (6163779).

10012221 is a wasteful number, since it uses less digits than its factorization.

10012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 10012221 is about 3164.2093799242. The cubic root of 10012221 is about 215.5311977629.

Adding to 10012221 its reverse (12221001), we get a palindrome (22233222).

It can be divided in two parts, 100 and 12221, that added together give a palindrome (12321).

The spelling of 10012221 in words is "ten million, twelve thousand, two hundred twenty-one".