1212212102121 has 16 divisors (see below), whose sum is σ = 1813650673920. Its totient is φ = 800139999600.

The previous prime is 1212212102093. The next prime is 1212212102159. The reversal of 1212212102121 is 1212012122121.

1212212102121 is a `hidden beast` number, since 1 + 21 + 221 + 210 + 212 + 1 = 666.

It is not a de Polignac number, because 1212212102121 - 2¹⁴ = 1212212085737 is a prime.

It is a super-2 number, since 2×1212212102121² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212212102094 and 1212212102103.

It is not an unprimeable number, because it can be changed into a prime (1212212102191) 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, 222258385 + ... + 222263838.

It is an arithmetic number, because the mean of its divisors is an integer number (113353167120).

Almost surely, 2^{1212212102121} is an apocalyptic number.

It is an amenable number.

1212212102121 is a deficient number, since it is larger than the sum of its proper divisors (601438571799).

1212212102121 is a wasteful number, since it uses less digits than its factorization.

1212212102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444522333 (or 444522327 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212212102121 its reverse (1212012122121), we get a palindrome (2424224224242).

The spelling of 1212212102121 in words is "one trillion, two hundred twelve billion, two hundred twelve million, one hundred two thousand, one hundred twenty-one".