121201110202121 has 16 divisors (see below), whose sum is σ = 128673650448000. Its totient is φ = 113766708964608.

The previous prime is 121201110202097. The next prime is 121201110202129. The reversal of 121201110202121 is 121202011102121.

It is a cyclic number.

It is not a de Polignac number, because 121201110202121 - 2⁶ = 121201110202057 is a prime.

It is a super-2 number, since 2×121201110202121² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 121201110202121.

It is not an unprimeable number, because it can be changed into a prime (121201110202129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194609180 + ... + 195230978.

It is an arithmetic number, because the mean of its divisors is an integer number (8042103153000).

Almost surely, 2^{121201110202121} is an apocalyptic number.

It is an amenable number.

121201110202121 is a deficient number, since it is larger than the sum of its proper divisors (7472540245879).

121201110202121 is a wasteful number, since it uses less digits than its factorization.

121201110202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652448.

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

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

The spelling of 121201110202121 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred ten million, two hundred two thousand, one hundred twenty-one".