121212202111001 has 8 divisors (see below), whose sum is σ = 121485873213000. Its totient is φ = 120938547502080.

The previous prime is 121212202110949. The next prime is 121212202111019. The reversal of 121212202111001 is 100111202212121.

It can be written as a sum of positive squares in 4 ways, for example, as 2293940459776 + 118918261651225 = 1514576^2 + 10904965^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121212202111001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212202111061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10651571 + ... + 18864791.

It is an arithmetic number, because the mean of its divisors is an integer number (15185734151625).

Almost surely, 2^{121212202111001} is an apocalyptic number.

It is an amenable number.

121212202111001 is a deficient number, since it is larger than the sum of its proper divisors (273671101999).

121212202111001 is an equidigital number, since it uses as much as digits as its factorization.

121212202111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8246539.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121212202111001 its reverse (100111202212121), we get a palindrome (221323404323122).

The spelling of 121212202111001 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred two million, one hundred eleven thousand, one".