10122211221 has 16 divisors (see below), whose sum is σ = 14353080000. Its totient is φ = 6327065088.

The previous prime is 10122211199. The next prime is 10122211237. The reversal of 10122211221 is 12211222101.

It is not a de Polignac number, because 10122211221 - 2¹³ = 10122203029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10122211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122211261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 909846 + ... + 920903.

It is an arithmetic number, because the mean of its divisors is an integer number (897067500).

Almost surely, 2^10122211221 is an apocalyptic number.

It is an amenable number.

10122211221 is a deficient number, since it is larger than the sum of its proper divisors (4230868779).

10122211221 is a wasteful number, since it uses less digits than its factorization.

10122211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830868.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 10122211221 its reverse (12211222101), we get a palindrome (22333433322).

The spelling of 10122211221 in words is "ten billion, one hundred twenty-two million, two hundred eleven thousand, two hundred twenty-one".