12121202121211 has 8 divisors (see below), whose sum is σ = 12834244491984. Its totient is φ = 11408163137280.

The previous prime is 12121202121187. The next prime is 12121202121253. The reversal of 12121202121211 is 11212120212121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12121202121211 - 2⁵ = 12121202121179 is a prime.

It is a super-2 number, since 2×12121202121211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12121202151211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12878776 + ... + 13787866.

It is an arithmetic number, because the mean of its divisors is an integer number (1604280561498).

Almost surely, 2^{12121202121211} is an apocalyptic number.

12121202121211 is a deficient number, since it is larger than the sum of its proper divisors (713042370773).

12121202121211 is an equidigital number, since it uses as much as digits as its factorization.

12121202121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693421.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12121202121211 its reverse (11212120212121), we get a palindrome (23333322333332).

The spelling of 12121202121211 in words is "twelve trillion, one hundred twenty-one billion, two hundred two million, one hundred twenty-one thousand, two hundred eleven".