12221220122121 has 8 divisors (see below), whose sum is σ = 16295629210560. Its totient is φ = 8147145557552.

The previous prime is 12221220122119. The next prime is 12221220122123. The reversal of 12221220122121 is 12122102212221.

It is an interprime number because it is at equal distance from previous prime (12221220122119) and next prime (12221220122123).

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

It is a cyclic number.

It is not a de Polignac number, because 12221220122121 - 2¹ = 12221220122119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12221220122123) 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, 83545710 + ... + 83691863.

It is an arithmetic number, because the mean of its divisors is an integer number (2036953651320).

Almost surely, 2^{12221220122121} is an apocalyptic number.

It is an amenable number.

12221220122121 is a deficient number, since it is larger than the sum of its proper divisors (4074409088439).

12221220122121 is a wasteful number, since it uses less digits than its factorization.

12221220122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167261935.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12221220122121 its reverse (12122102212221), we get a palindrome (24343322334342).

The spelling of 12221220122121 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".