121202011102121 has 4 divisors (see below), whose sum is σ = 121222543381632. Its totient is φ = 121181478822612.

The previous prime is 121202011102069. The next prime is 121202011102163. The reversal of 121202011102121 is 121201110202121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121202011102121 - 2¹⁰ = 121202011101097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121202011102121.

It is not an unprimeable number, because it can be changed into a prime (121202011102171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10266130901 + ... + 10266142706.

It is an arithmetic number, because the mean of its divisors is an integer number (30305635845408).

Almost surely, 2^{121202011102121} is an apocalyptic number.

It is an amenable number.

121202011102121 is a deficient number, since it is larger than the sum of its proper divisors (20532279511).

121202011102121 is an equidigital number, since it uses as much as digits as its factorization.

121202011102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20532279510.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121202011102121 its reverse (121201110202121), we get a palindrome (242403121304242).

The spelling of 121202011102121 in words is "one hundred twenty-one trillion, two hundred two billion, eleven million, one hundred two thousand, one hundred twenty-one".