12121222202211 has 4 divisors (see below), whose sum is σ = 16161629602952. Its totient is φ = 8080814801472.

The previous prime is 12121222202161. The next prime is 12121222202231. The reversal of 12121222202211 is 11220222212121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12121222202211 - 2²⁹ = 12120685331299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121222202231) 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, 2020203700366 + ... + 2020203700371.

It is an arithmetic number, because the mean of its divisors is an integer number (4040407400738).

Almost surely, 2^{12121222202211} is an apocalyptic number.

12121222202211 is a deficient number, since it is larger than the sum of its proper divisors (4040407400741).

12121222202211 is an equidigital number, since it uses as much as digits as its factorization.

12121222202211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040407400740.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12121222202211 its reverse (11220222212121), we get a palindrome (23341444414332).

The spelling of 12121222202211 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred two thousand, two hundred eleven".