121001211111211 has 8 divisors (see below), whose sum is σ = 125219839255200. Its totient is φ = 116785661139840.

The previous prime is 121001211111197. The next prime is 121001211111241. The reversal of 121001211111211 is 112111112100121.

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

It is a cyclic number.

It is not a de Polignac number, because 121001211111211 - 2⁹ = 121001211110699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001211111241) 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 7 ways as a sum of consecutive naturals, for example, 769463166 + ... + 769620403.

It is an arithmetic number, because the mean of its divisors is an integer number (15652479906900).

Almost surely, 2^{121001211111211} is an apocalyptic number.

121001211111211 is a deficient number, since it is larger than the sum of its proper divisors (4218628143989).

121001211111211 is a wasteful number, since it uses less digits than its factorization.

121001211111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539086309.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 121001211111211 its reverse (112111112100121), we get a palindrome (233112323211332).

The spelling of 121001211111211 in words is "one hundred twenty-one trillion, one billion, two hundred eleven million, one hundred eleven thousand, two hundred eleven".