121220212020201 has 12 divisors (see below), whose sum is σ = 200109556350912. Its totient is φ = 69268692582936.

The previous prime is 121220212020163. The next prime is 121220212020227. The reversal of 121220212020201 is 102020212022121.

It is a happy number.

121220212020201 is a `hidden beast` number, since 1 + 21 + 220 + 21 + 202 + 0 + 201 = 666.

It is not a de Polignac number, because 121220212020201 - 2¹⁰ = 121220212019177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121220212020301) 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, 962065174701 + ... + 962065174826.

It is an arithmetic number, because the mean of its divisors is an integer number (16675796362576).

Almost surely, 2^{121220212020201} is an apocalyptic number.

It is an amenable number.

121220212020201 is a deficient number, since it is larger than the sum of its proper divisors (78889344330711).

121220212020201 is a wasteful number, since it uses less digits than its factorization.

121220212020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924130349540 (or 1924130349537 counting only the distinct ones).

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

Adding to 121220212020201 its reverse (102020212022121), we get a palindrome (223240424042322).

The spelling of 121220212020201 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred twelve million, twenty thousand, two hundred one".