121002110021211 has 4 divisors (see below), whose sum is σ = 161336146694952. Its totient is φ = 80668073347472.

The previous prime is 121002110021173. The next prime is 121002110021213. The reversal of 121002110021211 is 112120011200121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121002110021211 - 2⁶ = 121002110021147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121002110021213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20167018336866 + ... + 20167018336871.

It is an arithmetic number, because the mean of its divisors is an integer number (40334036673738).

Almost surely, 2^{121002110021211} is an apocalyptic number.

121002110021211 is a deficient number, since it is larger than the sum of its proper divisors (40334036673741).

121002110021211 is an equidigital number, since it uses as much as digits as its factorization.

121002110021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40334036673740.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121002110021211 its reverse (112120011200121), we get a palindrome (233122121221332).

The spelling of 121002110021211 in words is "one hundred twenty-one trillion, two billion, one hundred ten million, twenty-one thousand, two hundred eleven".