121201212122001 has 24 divisors (see below), whose sum is σ = 190984086596160. Its totient is φ = 73455142226400.

The previous prime is 121201212121987. The next prime is 121201212122033. The reversal of 121201212122001 is 100221212102121.

121201212122001 is a `hidden beast` number, since 12 + 120 + 121 + 212 + 200 + 1 = 666.

It is not a de Polignac number, because 121201212122001 - 2¹⁵ = 121201212089233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121201212522001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82429380 + ... + 83886858.

It is an arithmetic number, because the mean of its divisors is an integer number (7957670274840).

Almost surely, 2^{121201212122001} is an apocalyptic number.

121201212122001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121201212122001 is a deficient number, since it is larger than the sum of its proper divisors (69782874474159).

121201212122001 is a wasteful number, since it uses less digits than its factorization.

121201212122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297477 (or 2297474 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121201212122001 its reverse (100221212102121), we get a palindrome (221422424224122).

The spelling of 121201212122001 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twelve million, one hundred twenty-two thousand, one".