121202120211211 has 16 divisors (see below), whose sum is σ = 135886274496000. Its totient is φ = 107332955952768.

The previous prime is 121202120211083. The next prime is 121202120211311. The reversal of 121202120211211 is 112112021202121.

It is a happy number.

It is not a de Polignac number, because 121202120211211 - 2⁷ = 121202120211083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121202120211311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1023797611 + ... + 1023915988.

It is an arithmetic number, because the mean of its divisors is an integer number (8492892156000).

Almost surely, 2^{121202120211211} is an apocalyptic number.

121202120211211 is a deficient number, since it is larger than the sum of its proper divisors (14684154284789).

121202120211211 is a wasteful number, since it uses less digits than its factorization.

121202120211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047713798.

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

Adding to 121202120211211 its reverse (112112021202121), we get a palindrome (233314141413332).

The spelling of 121202120211211 in words is "one hundred twenty-one trillion, two hundred two billion, one hundred twenty million, two hundred eleven thousand, two hundred eleven".