1212210102121 has 16 divisors (see below), whose sum is σ = 1270356099840. Its totient is φ = 1155252571200.

The previous prime is 1212210102113. The next prime is 1212210102143. The reversal of 1212210102121 is 1212010122121.

It is a cyclic number.

It is not a de Polignac number, because 1212210102121 - 2³ = 1212210102113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212210102095 and 1212210102104.

It is not an unprimeable number, because it can be changed into a prime (1212210102721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194101 + ... + 1569106.

It is an arithmetic number, because the mean of its divisors is an integer number (79397256240).

Almost surely, 2^{1212210102121} is an apocalyptic number.

It is an amenable number.

1212210102121 is a deficient number, since it is larger than the sum of its proper divisors (58145997719).

1212210102121 is a wasteful number, since it uses less digits than its factorization.

1212210102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763544.

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

Adding to 1212210102121 its reverse (1212010122121), we get a palindrome (2424220224242).

The spelling of 1212210102121 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred two thousand, one hundred twenty-one".