121211102211210 has 96 divisors (see below), whose sum is σ = 344012439476160. Its totient is φ = 29366246649600.

The previous prime is 121211102211193. The next prime is 121211102211217. The reversal of 121211102211210 is 12112201112121.

It is a happy number.

121211102211210 is a `hidden beast` number, since 1 + 2 + 121 + 110 + 221 + 1 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121211102211217) 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 47 ways as a sum of consecutive naturals, for example, 36454156 + ... + 39639975.

It is an arithmetic number, because the mean of its divisors is an integer number (3583462911210).

Almost surely, 2^{121211102211210} is an apocalyptic number.

121211102211210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211102211210 is an abundant number, since it is smaller than the sum of its proper divisors (222801337264950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121211102211210 is a wasteful number, since it uses less digits than its factorization.

121211102211210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76095764 (or 76095761 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121211102211210 its reverse (12112201112121), we get a palindrome (133323303323331).

The spelling of 121211102211210 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred two million, two hundred eleven thousand, two hundred ten".