1212120110 has 32 divisors (see below), whose sum is σ = 2195406720. Its totient is φ = 481840128.

The previous prime is 1212120109. The next prime is 1212120113. The reversal of 1212120110 is 110212121.

It is a super-2 number, since 2×1212120110² = 2938470322132824200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212120091 and 1212120100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212120113) by changing a digit.

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, 1800734 + ... + 1801406.

It is an arithmetic number, because the mean of its divisors is an integer number (68606460).

Almost surely, 2^1212120110 is an apocalyptic number.

1212120110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212120110 is a deficient number, since it is larger than the sum of its proper divisors (983286610).

1212120110 is a wasteful number, since it uses less digits than its factorization.

1212120110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532.

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

The square root of 1212120110 is about 34815.5153631251. The cubic root of 1212120110 is about 1066.2242411064.

Adding to 1212120110 its reverse (110212121), we get a palindrome (1322332231).

The spelling of 1212120110 in words is "one billion, two hundred twelve million, one hundred twenty thousand, one hundred ten".