121111200202221 has 24 divisors (see below), whose sum is σ = 175866040512864. Its totient is φ = 80313749308320.

The previous prime is 121111200202211. The next prime is 121111200202259. The reversal of 121111200202221 is 122202002111121.

121111200202221 is a `hidden beast` number, since 1 + 211 + 11 + 20 + 0 + 202 + 221 = 666.

It is not a de Polignac number, because 121111200202221 - 2³⁰ = 121110126460397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121111200202194 and 121111200202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111200202211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44117835 + ... + 46782536.

It is an arithmetic number, because the mean of its divisors is an integer number (7327751688036).

Almost surely, 2^{121111200202221} is an apocalyptic number.

It is an amenable number.

121111200202221 is a deficient number, since it is larger than the sum of its proper divisors (54754840310643).

121111200202221 is a wasteful number, since it uses less digits than its factorization.

121111200202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90901161 (or 90901158 counting only the distinct ones).

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

Adding to 121111200202221 its reverse (122202002111121), we get a palindrome (243313202313342).

The spelling of 121111200202221 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred million, two hundred two thousand, two hundred twenty-one".