12121010122 has 8 divisors (see below), whose sum is σ = 19580093316. Its totient is φ = 5594312352.

The previous prime is 12121010117. The next prime is 12121010129. The reversal of 12121010122 is 22101012121.

It can be written as a sum of positive squares in 2 ways, for example, as 11498058441 + 622951681 = 107229^2 + 24959^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (12121010129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233096323 + ... + 233096374.

Almost surely, 2^12121010122 is an apocalyptic number.

12121010122 is a deficient number, since it is larger than the sum of its proper divisors (7459083194).

12121010122 is a wasteful number, since it uses less digits than its factorization.

12121010122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466192712.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12121010122 its reverse (22101012121), we get a palindrome (34222022243).

The spelling of 12121010122 in words is "twelve billion, one hundred twenty-one million, ten thousand, one hundred twenty-two".