121110202121 has 4 divisors (see below), whose sum is σ = 121112348544. Its totient is φ = 121108055700.

The previous prime is 121110202111. The next prime is 121110202123. The reversal of 121110202121 is 121202011121.

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 121110202121 - 2¹⁴ = 121110185737 is a prime.

It is a super-4 number, since 4×121110202121⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121110202096 and 121110202105.

It is not an unprimeable number, because it can be changed into a prime (121110202123) 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 3 ways as a sum of consecutive naturals, for example, 986225 + ... + 1102206.

It is an arithmetic number, because the mean of its divisors is an integer number (30278087136).

Almost surely, 2^121110202121 is an apocalyptic number.

It is an amenable number.

121110202121 is a deficient number, since it is larger than the sum of its proper divisors (2146423).

121110202121 is an equidigital number, since it uses as much as digits as its factorization.

121110202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146422.

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

Adding to 121110202121 its reverse (121202011121), we get a palindrome (242312213242).

The spelling of 121110202121 in words is "one hundred twenty-one billion, one hundred ten million, two hundred two thousand, one hundred twenty-one".