121002211001 has 16 divisors (see below), whose sum is σ = 141599551104. Its totient is φ = 101235947904.

The previous prime is 121002210991. The next prime is 121002211007. The reversal of 121002211001 is 100112200121.

It is a de Polignac number, because none of the positive numbers 2^k-121002211001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121002211007) 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 15 ways as a sum of consecutive naturals, for example, 314765 + ... + 584021.

It is an arithmetic number, because the mean of its divisors is an integer number (8849971944).

Almost surely, 2^121002211001 is an apocalyptic number.

It is an amenable number.

121002211001 is a deficient number, since it is larger than the sum of its proper divisors (20597340103).

121002211001 is a wasteful number, since it uses less digits than its factorization.

121002211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270800.

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

Adding to 121002211001 its reverse (100112200121), we get a palindrome (221114411122).

The spelling of 121002211001 in words is "one hundred twenty-one billion, two million, two hundred eleven thousand, one".