121210102012221 has 24 divisors (see below), whose sum is σ = 181493681469984. Its totient is φ = 77887976617440.

The previous prime is 121210102012213. The next prime is 121210102012231. The reversal of 121210102012221 is 122210201012121.

121210102012221 is a `hidden beast` number, since 1 + 21 + 210 + 10 + 201 + 2 + 221 = 666.

It is not a de Polignac number, because 121210102012221 - 2³ = 121210102012213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121210102012194 and 121210102012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210102012231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1700872315 + ... + 1700943576.

It is an arithmetic number, because the mean of its divisors is an integer number (7562236727916).

Almost surely, 2^{121210102012221} is an apocalyptic number.

It is an amenable number.

121210102012221 is a deficient number, since it is larger than the sum of its proper divisors (60283579457763).

121210102012221 is a wasteful number, since it uses less digits than its factorization.

121210102012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401816041 (or 3401816038 counting only the distinct ones).

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

Adding to 121210102012221 its reverse (122210201012121), we get a palindrome (243420303024342).

The spelling of 121210102012221 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred two million, twelve thousand, two hundred twenty-one".