121000212211221 has 12 divisors (see below), whose sum is σ = 199746382063072. Its totient is φ = 69142978406376.

The previous prime is 121000212211187. The next prime is 121000212211223. The reversal of 121000212211221 is 122112212000121.

121000212211221 is a `hidden beast` number, since 1 + 21 + 0 + 0 + 0 + 212 + 211 + 221 = 666.

It is not a de Polignac number, because 121000212211221 - 2¹⁸ = 121000211949077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121000212211194 and 121000212211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000212211223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 960319144471 + ... + 960319144596.

Almost surely, 2^{121000212211221} is an apocalyptic number.

It is an amenable number.

121000212211221 is a deficient number, since it is larger than the sum of its proper divisors (78746169851851).

121000212211221 is a wasteful number, since it uses less digits than its factorization.

121000212211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920638289080 (or 1920638289077 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121000212211221 its reverse (122112212000121), we get a palindrome (243112424211342).

The spelling of 121000212211221 in words is "one hundred twenty-one trillion, two hundred twelve million, two hundred eleven thousand, two hundred twenty-one".