10212221121210 has 48 divisors (see below), whose sum is σ = 26814663799560. Its totient is φ = 2696296003200.

The previous prime is 10212221121191. The next prime is 10212221121217. The reversal of 10212221121210 is 1212112221201.

10212221121210 is a `hidden beast` number, since 1 + 0 + 212 + 221 + 1 + 21 + 210 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7664918936481 + 2547302184729 = 2768559^2 + 1596027^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (10212221121217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 561719245 + ... + 561737424.

Almost surely, 2^{10212221121210} is an apocalyptic number.

10212221121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10212221121210 is an abundant number, since it is smaller than the sum of its proper divisors (16602442678350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10212221121210 is a wasteful number, since it uses less digits than its factorization.

10212221121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123456783 (or 1123456780 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 10212221121210 its reverse (1212112221201), we get a palindrome (11424333342411).

The spelling of 10212221121210 in words is "ten trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred ten".