12121221201222 has 32 divisors (see below), whose sum is σ = 28454449773312. Its totient is φ = 3369605893344.

The previous prime is 12121221201113. The next prime is 12121221201223. The reversal of 12121221201222 is 22210212212121.

It is a super-2 number, since 2×12121221201222² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121221201223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3900005268 + ... + 3900008375.

It is an arithmetic number, because the mean of its divisors is an integer number (889201555416).

Almost surely, 2^{12121221201222} is an apocalyptic number.

12121221201222 is an abundant number, since it is smaller than the sum of its proper divisors (16333228572090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121221201222 is a wasteful number, since it uses less digits than its factorization.

12121221201222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7800013692.

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

Adding to 12121221201222 its reverse (22210212212121), we get a palindrome (34331433413343).

The spelling of 12121221201222 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty-two".