121420102020201 has 16 divisors (see below), whose sum is σ = 182830511848320. Its totient is φ = 79619739028560.

The previous prime is 121420102020179. The next prime is 121420102020277. The reversal of 121420102020201 is 102020201024121.

121420102020201 is a `hidden beast` number, since 1 + 2 + 1 + 420 + 1 + 0 + 20 + 20 + 201 = 666.

It is not a de Polignac number, because 121420102020201 - 2¹⁷ = 121420101889129 is a prime.

It is a super-2 number, since 2×121420102020201² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121420102020601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36860988645 + ... + 36860991938.

It is an arithmetic number, because the mean of its divisors is an integer number (11426906990520).

Almost surely, 2^{121420102020201} is an apocalyptic number.

It is an amenable number.

121420102020201 is a deficient number, since it is larger than the sum of its proper divisors (61410409828119).

121420102020201 is an equidigital number, since it uses as much as digits as its factorization.

121420102020201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73721980653 (or 73721980647 counting only the distinct ones).

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

Adding to 121420102020201 its reverse (102020201024121), we get a palindrome (223440303044322).

The spelling of 121420102020201 in words is "one hundred twenty-one trillion, four hundred twenty billion, one hundred two million, twenty thousand, two hundred one".