10112221222121 has 8 divisors (see below), whose sum is σ = 10123963439304. Its totient is φ = 10100482784640.

The previous prime is 10112221222097. The next prime is 10112221222127. The reversal of 10112221222121 is 12122212221101.

It can be written as a sum of positive squares in 4 ways, for example, as 1745202165721 + 8367019056400 = 1321061^2 + 2892580^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10112221222121 is a prime.

It is a super-2 number, since 2×10112221222121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10112221222093 and 10112221222102.

It is not an unprimeable number, because it can be changed into a prime (10112221222127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4426691 + ... + 6310311.

It is an arithmetic number, because the mean of its divisors is an integer number (1265495429913).

Almost surely, 2^{10112221222121} is an apocalyptic number.

It is an amenable number.

10112221222121 is a deficient number, since it is larger than the sum of its proper divisors (11742217183).

10112221222121 is a wasteful number, since it uses less digits than its factorization.

10112221222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889851.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 10112221222121 its reverse (12122212221101), we get a palindrome (22234433443222).

The spelling of 10112221222121 in words is "ten trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-one".