1212021122201 has 16 divisors (see below), whose sum is σ = 1293867878400. Its totient is φ = 1131982160400.

The previous prime is 1212021122173. The next prime is 1212021122281. The reversal of 1212021122201 is 1022211202121.

It is a cyclic number.

It is not a de Polignac number, because 1212021122201 - 2²⁶ = 1211954013337 is a prime.

It is a super-2 number, since 2×1212021122201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212021122201.

It is not an unprimeable number, because it can be changed into a prime (1212021122281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35703206 + ... + 35737136.

It is an arithmetic number, because the mean of its divisors is an integer number (80866742400).

Almost surely, 2^{1212021122201} is an apocalyptic number.

It is an amenable number.

1212021122201 is a deficient number, since it is larger than the sum of its proper divisors (81846756199).

1212021122201 is a wasteful number, since it uses less digits than its factorization.

1212021122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60500.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212021122201 its reverse (1022211202121), we get a palindrome (2234232324322).

The spelling of 1212021122201 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred twenty-two thousand, two hundred one".