121211202212011 has 4 divisors (see below), whose sum is σ = 121215867616624. Its totient is φ = 121206536807400.

The previous prime is 121211202211843. The next prime is 121211202212017. The reversal of 121211202212011 is 110212202112121.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121211202212011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121211202212011.

It is not an unprimeable number, because it can be changed into a prime (121211202212017) 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, 2332663335 + ... + 2332715296.

It is an arithmetic number, because the mean of its divisors is an integer number (30303966904156).

Almost surely, 2^{121211202212011} is an apocalyptic number.

121211202212011 is a deficient number, since it is larger than the sum of its proper divisors (4665404613).

121211202212011 is an equidigital number, since it uses as much as digits as its factorization.

121211202212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4665404612.

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

Adding to 121211202212011 its reverse (110212202112121), we get a palindrome (231423404324132).

The spelling of 121211202212011 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred two million, two hundred twelve thousand, eleven".