121512121001201 has 16 divisors (see below), whose sum is σ = 138962852057088. Its totient is φ = 104084358912000.

The previous prime is 121512121001179. The next prime is 121512121001209. The reversal of 121512121001201 is 102100121215121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121512121001201 is a prime.

It is a super-3 number, since 3×121512121001201³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121512121001209) 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, 328303421 + ... + 328673333.

It is an arithmetic number, because the mean of its divisors is an integer number (8685178253568).

Almost surely, 2^{121512121001201} is an apocalyptic number.

It is an amenable number.

121512121001201 is a deficient number, since it is larger than the sum of its proper divisors (17450731055887).

121512121001201 is a wasteful number, since it uses less digits than its factorization.

121512121001201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400832.

The product of its (nonzero) digits is 80, while the sum is 20.

Adding to 121512121001201 its reverse (102100121215121), we get a palindrome (223612242216322).

The spelling of 121512121001201 in words is "one hundred twenty-one trillion, five hundred twelve billion, one hundred twenty-one million, one thousand, two hundred one".