12010210121 has 12 divisors (see below), whose sum is σ = 15045758532. Its totient is φ = 9502583328.

The previous prime is 12010210117. The next prime is 12010210139. The reversal of 12010210121 is 12101201021.

It can be written as a sum of positive squares in 2 ways, for example, as 8219960896 + 3790249225 = 90664^2 + 61565^2 .

It is not a de Polignac number, because 12010210121 - 2² = 12010210117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12010210111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9426530 + ... + 9427803.

It is an arithmetic number, because the mean of its divisors is an integer number (1253813211).

Almost surely, 2^12010210121 is an apocalyptic number.

It is an amenable number.

12010210121 is a deficient number, since it is larger than the sum of its proper divisors (3035548411).

12010210121 is a wasteful number, since it uses less digits than its factorization.

12010210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18854360 (or 18854353 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12010210121 its reverse (12101201021), we get a palindrome (24111411142).

The spelling of 12010210121 in words is "twelve billion, ten million, two hundred ten thousand, one hundred twenty-one".