121221002211001 has 16 divisors (see below), whose sum is σ = 151133182599168. Its totient is φ = 94457608477200.

The previous prime is 121221002210989. The next prime is 121221002211007. The reversal of 121221002211001 is 100112200122121.

It is a cyclic number.

It is not a de Polignac number, because 121221002211001 - 2⁹ = 121221002210489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221002211007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22087906 + ... + 27024388.

It is an arithmetic number, because the mean of its divisors is an integer number (9445823912448).

Almost surely, 2^{121221002211001} is an apocalyptic number.

121221002211001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121221002211001 is a deficient number, since it is larger than the sum of its proper divisors (29912180388167).

121221002211001 is a wasteful number, since it uses less digits than its factorization.

121221002211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5255412.

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

Adding to 121221002211001 its reverse (100112200122121), we get a palindrome (221333202333122).

The spelling of 121221002211001 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two million, two hundred eleven thousand, one".