1212212122121 has 48 divisors (see below), whose sum is σ = 1646155053312. Its totient is φ = 868603443840.

The previous prime is 1212212122049. The next prime is 1212212122129.

1212212122121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1212212122121 - 2¹⁰ = 1212212121097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212212122093 and 1212212122102.

It is not an unprimeable number, because it can be changed into a prime (1212212122129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2686595 + ... + 3105191.

It is an arithmetic number, because the mean of its divisors is an integer number (34294896944).

Almost surely, 2^{1212212122121} is an apocalyptic number.

1212212122121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212212122121 is a deficient number, since it is larger than the sum of its proper divisors (433942931191).

1212212122121 is a wasteful number, since it uses less digits than its factorization.

1212212122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418902 (or 418891 counting only the distinct ones).

The product of its digits is 128, while the sum is 20.

The spelling of 1212212122121 in words is "one trillion, two hundred twelve billion, two hundred twelve million, one hundred twenty-two thousand, one hundred twenty-one".