121112212110 has 32 divisors (see below), whose sum is σ = 298525239072. Its totient is φ = 31423708800.

The previous prime is 121112212099. The next prime is 121112212153. The reversal of 121112212110 is 11212211121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121112212110.

It is a congruent number.

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, 54553941 + ... + 54556160.

It is an arithmetic number, because the mean of its divisors is an integer number (9328913721).

Almost surely, 2^121112212110 is an apocalyptic number.

121112212110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121112212110 is an abundant number, since it is smaller than the sum of its proper divisors (177413026962).

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

121112212110 is a wasteful number, since it uses less digits than its factorization.

121112212110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109110148.

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

Adding to 121112212110 its reverse (11212211121), we get a palindrome (132324423231).

The spelling of 121112212110 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand, one hundred ten".