1212121120201 has 32 divisors (see below), whose sum is σ = 1287489369600. Its totient is φ = 1139959941120.

The previous prime is 1212121120159. The next prime is 1212121120213. The reversal of 1212121120201 is 1020211212121.

It is a cyclic number.

It is not a de Polignac number, because 1212121120201 - 2⁷ = 1212121120073 is a prime.

It is a super-2 number, since 2×1212121120201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212121120241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24497755 + ... + 24547183.

It is an arithmetic number, because the mean of its divisors is an integer number (40234042800).

Almost surely, 2^{1212121120201} is an apocalyptic number.

It is an amenable number.

1212121120201 is a deficient number, since it is larger than the sum of its proper divisors (75368249399).

1212121120201 is a wasteful number, since it uses less digits than its factorization.

1212121120201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49729.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212121120201 its reverse (1020211212121), we get a palindrome (2232332332322).

The spelling of 1212121120201 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty thousand, two hundred one".