100210120021221 has 12 divisors (see below), whose sum is σ = 155427941257632. Its totient is φ = 57262925726328.

The previous prime is 100210120021217. The next prime is 100210120021223. The reversal of 100210120021221 is 122120021012001.

It is not a de Polignac number, because 100210120021221 - 2² = 100210120021217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100210120021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100210120021223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340850748225 + ... + 340850748518.

It is an arithmetic number, because the mean of its divisors is an integer number (12952328438136).

Almost surely, 2^{100210120021221} is an apocalyptic number.

It is an amenable number.

100210120021221 is a deficient number, since it is larger than the sum of its proper divisors (55217821236411).

100210120021221 is an equidigital number, since it uses as much as digits as its factorization.

100210120021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681701496760 (or 681701496753 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 100210120021221 its reverse (122120021012001), we get a palindrome (222330141033222).

The spelling of 100210120021221 in words is "one hundred trillion, two hundred ten billion, one hundred twenty million, twenty-one thousand, two hundred twenty-one".