121100200221 has 48 divisors (see below), whose sum is σ = 218437208192. Its totient is φ = 58070010240.

The previous prime is 121100200187. The next prime is 121100200241. The reversal of 121100200221 is 122002001121.

It is not a de Polignac number, because 121100200221 - 2⁶ = 121100200157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121100200197 and 121100200206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100200241) 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, 1799986 + ... + 1866051.

Almost surely, 2^121100200221 is an apocalyptic number.

121100200221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121100200221 is a deficient number, since it is larger than the sum of its proper divisors (97337007971).

121100200221 is a wasteful number, since it uses less digits than its factorization.

121100200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666082 (or 3666071 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121100200221 its reverse (122002001121), we get a palindrome (243102201342).

Subtracting 121100200221 from its reverse (122002001121), we obtain a square (901800900 = 30030²).

The spelling of 121100200221 in words is "one hundred twenty-one billion, one hundred million, two hundred thousand, two hundred twenty-one".