121000121012221 has 48 divisors (see below), whose sum is σ = 137150909151984. Its totient is φ = 106634880000000.

The previous prime is 121000121012203. The next prime is 121000121012299. The reversal of 121000121012221 is 122210121000121.

It can be written as a sum of positive squares in 8 ways, for example, as 886631275321 + 120113489736900 = 941611^2 + 10959630^2 .

It is not a de Polignac number, because 121000121012221 - 2⁵ = 121000121012189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121000121012195 and 121000121012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000121042221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121727221 + ... + 122717221.

It is an arithmetic number, because the mean of its divisors is an integer number (2857310607333).

Almost surely, 2^{121000121012221} is an apocalyptic number.

121000121012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121000121012221 is a deficient number, since it is larger than the sum of its proper divisors (16150788139763).

121000121012221 is a wasteful number, since it uses less digits than its factorization.

121000121012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990334 (or 990323 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121000121012221 its reverse (122210121000121), we get a palindrome (243210242012342).

It can be divided in two parts, 1210001 and 21012221, that added together give a palindrome (22222222).

The spelling of 121000121012221 in words is "one hundred twenty-one trillion, one hundred twenty-one million, twelve thousand, two hundred twenty-one".