12121210210 has 16 divisors (see below), whose sum is σ = 22043109816. Its totient is φ = 4798499328.

The previous prime is 12121210207. The next prime is 12121210217. The reversal of 12121210210 is 1201212121.

It can be written as a sum of positive squares in 4 ways, for example, as 10480231129 + 1640979081 = 102373^2 + 40509^2 .

It is not an unprimeable number, because it can be changed into a prime (12121210217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6247077 + ... + 6249016.

Almost surely, 2^12121210210 is an apocalyptic number.

12121210210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121210210 is a deficient number, since it is larger than the sum of its proper divisors (9921899606).

12121210210 is a wasteful number, since it uses less digits than its factorization.

12121210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12496197.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12121210210 its reverse (1201212121), we get a palindrome (13322422331).

The spelling of 12121210210 in words is "twelve billion, one hundred twenty-one million, two hundred ten thousand, two hundred ten".