121111020210 has 32 divisors (see below), whose sum is σ = 290695407552. Its totient is φ = 32293054400.

The previous prime is 121111020181. The next prime is 121111020227. The reversal of 121111020210 is 12020111121.

121111020210 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113077 + ... + 504983.

It is an arithmetic number, because the mean of its divisors is an integer number (9084231486).

Almost surely, 2^121111020210 is an apocalyptic number.

121111020210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111020210 is an abundant number, since it is smaller than the sum of its proper divisors (169584387342).

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

121111020210 is a wasteful number, since it uses less digits than its factorization.

121111020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402218.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121111020210 its reverse (12020111121), we get a palindrome (133131131331).

The spelling of 121111020210 in words is "one hundred twenty-one billion, one hundred eleven million, twenty thousand, two hundred ten".