10122221121 has 8 divisors (see below), whose sum is σ = 13514462400. Its totient is φ = 6739063632.

The previous prime is 10122221119. The next prime is 10122221147. The reversal of 10122221121 is 12112222101.

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

It is not a de Polignac number, because 10122221121 - 2¹ = 10122221119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10122221121.

It is not an unprimeable number, because it can be changed into a prime (10122201121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2268346 + ... + 2272803.

It is an arithmetic number, because the mean of its divisors is an integer number (1689307800).

Almost surely, 2^10122221121 is an apocalyptic number.

It is an amenable number.

10122221121 is a deficient number, since it is larger than the sum of its proper divisors (3392241279).

10122221121 is an equidigital number, since it uses as much as digits as its factorization.

10122221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4541895.

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

Adding to 10122221121 its reverse (12112222101), we get a palindrome (22234443222).

The spelling of 10122221121 in words is "ten billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".