10221121111210 has 16 divisors (see below), whose sum is σ = 18398226162600. Its totient is φ = 4088402186176.

The previous prime is 10221121111189. The next prime is 10221121111211. The reversal of 10221121111210 is 1211112112201.

It can be written as a sum of positive squares in 4 ways, for example, as 8633800818889 + 1587320292321 = 2938333^2 + 1259889^2 .

It is not an unprimeable number, because it can be changed into a prime (10221121111211) 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 7 ways as a sum of consecutive naturals, for example, 4847065 + ... + 6628444.

Almost surely, 2^{10221121111210} is an apocalyptic number.

10221121111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10221121111210 is a deficient number, since it is larger than the sum of its proper divisors (8177105051390).

10221121111210 is a wasteful number, since it uses less digits than its factorization.

10221121111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11564585.

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

Adding to 10221121111210 its reverse (1211112112201), we get a palindrome (11432233223411).

The spelling of 10221121111210 in words is "ten trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, two hundred ten".