121021121201 has 4 divisors (see below), whose sum is σ = 121104413172. Its totient is φ = 120937829232.

The previous prime is 121021121189. The next prime is 121021121251. The reversal of 121021121201 is 102121120121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59450142976 + 61570978225 = 243824^2 + 248135^2 .

It is a cyclic number.

It is not a de Polignac number, because 121021121201 - 2²⁶ = 120954012337 is a prime.

It is a super-2 number, since 2×121021121201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021121251) 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 3 ways as a sum of consecutive naturals, for example, 41643806 + ... + 41646711.

It is an arithmetic number, because the mean of its divisors is an integer number (30276103293).

Almost surely, 2^121021121201 is an apocalyptic number.

It is an amenable number.

121021121201 is a deficient number, since it is larger than the sum of its proper divisors (83291971).

121021121201 is an equidigital number, since it uses as much as digits as its factorization.

121021121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83291970.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121021121201 its reverse (102121120121), we get a palindrome (223142241322).

The spelling of 121021121201 in words is "one hundred twenty-one billion, twenty-one million, one hundred twenty-one thousand, two hundred one".