121212110 has 8 divisors (see below), whose sum is σ = 218181816. Its totient is φ = 48484840.

The previous prime is 121212103. The next prime is 121212127. The reversal of 121212110 is 11212121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×121212110² = 29384751221304200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121212091 and 121212100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6060596 + ... + 6060615.

It is an arithmetic number, because the mean of its divisors is an integer number (27272727).

Almost surely, 2^121212110 is an apocalyptic number.

121212110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121212110 is a deficient number, since it is larger than the sum of its proper divisors (96969706).

121212110 is a wasteful number, since it uses less digits than its factorization.

121212110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12121218.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 121212110 is about 11009.6371420679. The cubic root of 121212110 is about 494.8975879006.

Adding to 121212110 its sum of digits (11), we get a palindrome (121212121).

Adding to 121212110 its reverse (11212121), we get a palindrome (132424231).

The spelling of 121212110 in words is "one hundred twenty-one million, two hundred twelve thousand, one hundred ten".