12101211220101 has 4 divisors (see below), whose sum is σ = 16134948293472. Its totient is φ = 8067474146732.

The previous prime is 12101211220099. The next prime is 12101211220223. The reversal of 12101211220101 is 10102211210121.

It is a happy number.

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 12101211220101 - 2¹ = 12101211220099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101211220001) 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, 2016868536681 + ... + 2016868536686.

It is an arithmetic number, because the mean of its divisors is an integer number (4033737073368).

Almost surely, 2^{12101211220101} is an apocalyptic number.

It is an amenable number.

12101211220101 is a deficient number, since it is larger than the sum of its proper divisors (4033737073371).

12101211220101 is an equidigital number, since it uses as much as digits as its factorization.

12101211220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033737073370.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12101211220101 its reverse (10102211210121), we get a palindrome (22203422430222).

The spelling of 12101211220101 in words is "twelve trillion, one hundred one billion, two hundred eleven million, two hundred twenty thousand, one hundred one".