121221212110 has 32 divisors (see below), whose sum is σ = 218914151040. Its totient is φ = 48329620512.

The previous prime is 121221212081. The next prime is 121221212131. The reversal of 121221212110 is 11212122121.

121221212110 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121221212110² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4221381 + ... + 4249999.

It is an arithmetic number, because the mean of its divisors is an integer number (6841067220).

Almost surely, 2^121221212110 is an apocalyptic number.

121221212110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221212110 is a deficient number, since it is larger than the sum of its proper divisors (97692938930).

121221212110 is a wasteful number, since it uses less digits than its factorization.

121221212110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30000.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121221212110 its reverse (11212122121), we get a palindrome (132433334231).

The spelling of 121221212110 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, one hundred ten".