10212121121210 has 32 divisors (see below), whose sum is σ = 19697596656192. Its totient is φ = 3798243201280.

The previous prime is 10212121121173. The next prime is 10212121121219. The reversal of 10212121121210 is 1212112121201.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10212121121219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361861196 + ... + 361889415.

It is an arithmetic number, because the mean of its divisors is an integer number (615549895506).

Almost surely, 2^{10212121121210} is an apocalyptic number.

10212121121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10212121121210 is a deficient number, since it is larger than the sum of its proper divisors (9485475534982).

10212121121210 is a wasteful number, since it uses less digits than its factorization.

10212121121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723750718.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 10212121121210 its reverse (1212112121201), we get a palindrome (11424233242411).

Subtracting from 10212121121210 its reverse (1212112121201), we obtain a palindrome (9000009000009).

The spelling of 10212121121210 in words is "ten trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred ten".