12221212010121 has 24 divisors (see below), whose sum is σ = 17924472675200. Its totient is φ = 8022959974656.

The previous prime is 12221212010101. The next prime is 12221212010129. The reversal of 12221212010121 is 12101021212221.

12221212010121 is a `hidden beast` number, since 1 + 222 + 121 + 201 + 0 + 121 = 666.

It is not a de Polignac number, because 12221212010121 - 2¹¹ = 12221212008073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221212010094 and 12221212010103.

It is not an unprimeable number, because it can be changed into a prime (12221212010129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34999885 + ... + 35347338.

Almost surely, 2^{12221212010121} is an apocalyptic number.

It is an amenable number.

12221212010121 is a deficient number, since it is larger than the sum of its proper divisors (5703260665079).

12221212010121 is a wasteful number, since it uses less digits than its factorization.

12221212010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70347525 (or 70347522 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12221212010121 its reverse (12101021212221), we get a palindrome (24322233222342).

The spelling of 12221212010121 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, ten thousand, one hundred twenty-one".