121210200220221 has 160 divisors (see below), whose sum is σ = 217903442803200. Its totient is φ = 65646671118336.

The previous prime is 121210200220097. The next prime is 121210200220229. The reversal of 121210200220221 is 122022002012121.

It is a happy number.

121210200220221 is a `hidden beast` number, since 1 + 2 + 1 + 21 + 0 + 200 + 220 + 221 = 666.

It is not a de Polignac number, because 121210200220221 - 2⁷ = 121210200220093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121210200220194 and 121210200220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210200220229) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 6408820461 + ... + 6408839373.

It is an arithmetic number, because the mean of its divisors is an integer number (1361896517520).

Almost surely, 2^{121210200220221} is an apocalyptic number.

It is an amenable number.

121210200220221 is a deficient number, since it is larger than the sum of its proper divisors (96693242582979).

121210200220221 is a wasteful number, since it uses less digits than its factorization.

121210200220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23417 (or 23408 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121210200220221 its reverse (122022002012121), we get a palindrome (243232202232342).

The spelling of 121210200220221 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred million, two hundred twenty thousand, two hundred twenty-one".