121212001001 has 32 divisors (see below), whose sum is σ = 150084388608. Its totient is φ = 95326709760.

The previous prime is 121212000989. The next prime is 121212001013. The reversal of 121212001001 is 100100212121.

It is an interprime number because it is at equal distance from previous prime (121212000989) and next prime (121212001013).

It is a cyclic number.

It is not a de Polignac number, because 121212001001 - 2¹⁰ = 121211999977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121212001021) 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 31 ways as a sum of consecutive naturals, for example, 12342245 + ... + 12352061.

It is an arithmetic number, because the mean of its divisors is an integer number (4690137144).

Almost surely, 2^121212001001 is an apocalyptic number.

It is an amenable number.

121212001001 is a deficient number, since it is larger than the sum of its proper divisors (28872387607).

121212001001 is a wasteful number, since it uses less digits than its factorization.

121212001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10641.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121212001001 its reverse (100100212121), we get a palindrome (221312213122).

The spelling of 121212001001 in words is "one hundred twenty-one billion, two hundred twelve million, one thousand, one".