1212222022121 has 8 divisors (see below), whose sum is σ = 1392025288800. Its totient is φ = 1044018966240.

The previous prime is 1212222022079. The next prime is 1212222022129. The reversal of 1212222022121 is 1212202222121.

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 1212222022121 - 2¹⁰ = 1212222021097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212222022093 and 1212222022102.

It is not an unprimeable number, because it can be changed into a prime (1212222022129) 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 7 ways as a sum of consecutive naturals, for example, 2900052476 + ... + 2900052893.

It is an arithmetic number, because the mean of its divisors is an integer number (174003161100).

Almost surely, 2^{1212222022121} is an apocalyptic number.

1212222022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212222022121 is a deficient number, since it is larger than the sum of its proper divisors (179803266679).

1212222022121 is a wasteful number, since it uses less digits than its factorization.

1212222022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5800105399.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1212222022121 its reverse (1212202222121), we get a palindrome (2424424244242).

The spelling of 1212222022121 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, twenty-two thousand, one hundred twenty-one".