12121210002121 has 16 divisors (see below), whose sum is σ = 13820348298240. Its totient is φ = 10523154715920.

The previous prime is 12121210002073. The next prime is 12121210002157. The reversal of 12121210002121 is 12120001212121.

It is not a de Polignac number, because 12121210002121 - 2⁹ = 12121210001609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12121210002095 and 12121210002104.

It is not an unprimeable number, because it can be changed into a prime (12121210008121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38542845 + ... + 38856058.

It is an arithmetic number, because the mean of its divisors is an integer number (863771768640).

Almost surely, 2^{12121210002121} is an apocalyptic number.

12121210002121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12121210002121 is a deficient number, since it is larger than the sum of its proper divisors (1699138296119).

12121210002121 is a wasteful number, since it uses less digits than its factorization.

12121210002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77399556.

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

Adding to 12121210002121 its reverse (12120001212121), we get a palindrome (24241211214242).

The spelling of 12121210002121 in words is "twelve trillion, one hundred twenty-one billion, two hundred ten million, two thousand, one hundred twenty-one".