121131110210 has 32 divisors (see below), whose sum is σ = 250376270400. Its totient is φ = 41729376960.

The previous prime is 121131110197. The next prime is 121131110249. The reversal of 121131110210 is 12011131121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28976645 + ... + 28980824.

It is an arithmetic number, because the mean of its divisors is an integer number (7824258450).

Almost surely, 2^121131110210 is an apocalyptic number.

121131110210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121131110210 is an abundant number, since it is smaller than the sum of its proper divisors (129245160190).

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

121131110210 is a wasteful number, since it uses less digits than its factorization.

121131110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57957506.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 121131110210 its reverse (12011131121), we get a palindrome (133142241331).

The spelling of 121131110210 in words is "one hundred twenty-one billion, one hundred thirty-one million, one hundred ten thousand, two hundred ten".