10012201221 has 128 divisors (see below), whose sum is σ = 17020108800. Its totient is φ = 5154140160.

The previous prime is 10012201219. The next prime is 10012201237. The reversal of 10012201221 is 12210221001.

It is not a de Polignac number, because 10012201221 - 2¹ = 10012201219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10012201197 and 10012201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10012201291) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 20902060 + ... + 20902538.

It is an arithmetic number, because the mean of its divisors is an integer number (132969600).

Almost surely, 2^10012201221 is an apocalyptic number.

10012201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10012201221 is a deficient number, since it is larger than the sum of its proper divisors (7007907579).

10012201221 is a wasteful number, since it uses less digits than its factorization.

10012201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10012201221 its reverse (12210221001), we get a palindrome (22222422222).

The spelling of 10012201221 in words is "ten billion, twelve million, two hundred one thousand, two hundred twenty-one".