121102121211 has 16 divisors (see below), whose sum is σ = 165936211200. Its totient is φ = 78504091488.

The previous prime is 121102121167. The next prime is 121102121221. The reversal of 121102121211 is 112121201121.

It is a happy number.

It is not a de Polignac number, because 121102121211 - 2⁷ = 121102121083 is a prime.

It is a super-2 number, since 2×121102121211² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121102121221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157231 + ... + 516648.

It is an arithmetic number, because the mean of its divisors is an integer number (10371013200).

Almost surely, 2^121102121211 is an apocalyptic number.

121102121211 is a deficient number, since it is larger than the sum of its proper divisors (44834089989).

121102121211 is a wasteful number, since it uses less digits than its factorization.

121102121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675538.

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

Adding to 121102121211 its reverse (112121201121), we get a palindrome (233223322332).

The spelling of 121102121211 in words is "one hundred twenty-one billion, one hundred two million, one hundred twenty-one thousand, two hundred eleven".