121102021001 has 16 divisors (see below), whose sum is σ = 137466618240. Its totient is φ = 105760287360.

The previous prime is 121102020961. The next prime is 121102021021. The reversal of 121102021001 is 100120201121.

It is not a de Polignac number, because 121102021001 - 2¹⁰ = 121102019977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121102021021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146420 + ... + 513461.

It is an arithmetic number, because the mean of its divisors is an integer number (8591663640).

Almost surely, 2^121102021001 is an apocalyptic number.

It is an amenable number.

121102021001 is a deficient number, since it is larger than the sum of its proper divisors (16364597239).

121102021001 is a wasteful number, since it uses less digits than its factorization.

121102021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660656.

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

Adding to 121102021001 its reverse (100120201121), we get a palindrome (221222222122).

The spelling of 121102021001 in words is "one hundred twenty-one billion, one hundred two million, twenty-one thousand, one".