20010121212201 has 16 divisors (see below), whose sum is σ = 27141495292800. Its totient is φ = 13111209043328.

The previous prime is 20010121212187. The next prime is 20010121212223. The reversal of 20010121212201 is 10221212101002.

It is a cyclic number.

It is not a de Polignac number, because 20010121212201 - 2¹⁷ = 20010121081129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20010121212241) 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, 224339466 + ... + 224428643.

It is an arithmetic number, because the mean of its divisors is an integer number (1696343455800).

Almost surely, 2^{20010121212201} is an apocalyptic number.

It is an amenable number.

20010121212201 is a deficient number, since it is larger than the sum of its proper divisors (7131374080599).

20010121212201 is a wasteful number, since it uses less digits than its factorization.

20010121212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448768368.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20010121212201 its reverse (10221212101002), we get a palindrome (30231333313203).

The spelling of 20010121212201 in words is "twenty trillion, ten billion, one hundred twenty-one million, two hundred twelve thousand, two hundred one".