121220120202201 has 16 divisors (see below), whose sum is σ = 179585710672320. Its totient is φ = 80813257133760.

The previous prime is 121220120202197. The next prime is 121220120202271. The reversal of 121220120202201 is 102202021022121.

It is a happy number.

121220120202201 is a `hidden beast` number, since 1 + 21 + 220 + 1 + 20 + 202 + 201 = 666.

It is not a de Polignac number, because 121220120202201 - 2² = 121220120202197 is a prime.

It is a super-3 number, since 3×121220120202201³ (a number of 43 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121220120202271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10837681 + ... + 18970913.

It is an arithmetic number, because the mean of its divisors is an integer number (11224106917020).

Almost surely, 2^{121220120202201} is an apocalyptic number.

It is an amenable number.

121220120202201 is a deficient number, since it is larger than the sum of its proper divisors (58365590470119).

121220120202201 is an equidigital number, since it uses as much as digits as its factorization.

121220120202201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8685253 (or 8685247 counting only the distinct ones).

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

Adding to 121220120202201 its reverse (102202021022121), we get a palindrome (223422141224322).

The spelling of 121220120202201 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty million, two hundred two thousand, two hundred one".