12210121010 has 16 divisors (see below), whose sum is σ = 21980770200. Its totient is φ = 4883481216.

The previous prime is 12210120997. The next prime is 12210121013. The reversal of 12210121010 is 1012101221.

It can be written as a sum of positive squares in 4 ways, for example, as 8159689561 + 4050431449 = 90331^2 + 63643^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12210120982 and 12210121000.

It is not an unprimeable number, because it can be changed into a prime (12210121013) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 25796 + ... + 158384.

Almost surely, 2^12210121010 is an apocalyptic number.

12210121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12210121010 is a deficient number, since it is larger than the sum of its proper divisors (9770649190).

12210121010 is a wasteful number, since it uses less digits than its factorization.

12210121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141805.

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

Adding to 12210121010 its reverse (1012101221), we get a palindrome (13222222231).

The spelling of 12210121010 in words is "twelve billion, two hundred ten million, one hundred twenty-one thousand, ten".