20121100012201 has 4 divisors (see below), whose sum is σ = 20121113061504. Its totient is φ = 20121086962900.

The previous prime is 20121100012163. The next prime is 20121100012243. The reversal of 20121100012201 is 10221000112102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20121100012201 - 2¹⁵ = 20121099979433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121100012501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3844885 + ... + 7417906.

It is an arithmetic number, because the mean of its divisors is an integer number (5030278265376).

Almost surely, 2^{20121100012201} is an apocalyptic number.

It is an amenable number.

20121100012201 is a deficient number, since it is larger than the sum of its proper divisors (13049303).

20121100012201 is a wasteful number, since it uses less digits than its factorization.

20121100012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13049302.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121100012201 its reverse (10221000112102), we get a palindrome (30342100124303).

Subtracting from 20121100012201 its reverse (10221000112102), we obtain a palindrome (9900099900099).

The spelling of 20121100012201 in words is "twenty trillion, one hundred twenty-one billion, one hundred million, twelve thousand, two hundred one".