10010121112221 has 4 divisors (see below), whose sum is σ = 13346828149632. Its totient is φ = 6673414074812.

The previous prime is 10010121112217. The next prime is 10010121112223. The reversal of 10010121112221 is 12221112101001.

It is a happy number.

10010121112221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10010121112221 - 2² = 10010121112217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10010121112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10010121112223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1668353518701 + ... + 1668353518706.

It is an arithmetic number, because the mean of its divisors is an integer number (3336707037408).

Almost surely, 2^{10010121112221} is an apocalyptic number.

It is an amenable number.

10010121112221 is a deficient number, since it is larger than the sum of its proper divisors (3336707037411).

10010121112221 is an equidigital number, since it uses as much as digits as its factorization.

10010121112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336707037410.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10010121112221 its reverse (12221112101001), we get a palindrome (22231233213222).

The spelling of 10010121112221 in words is "ten trillion, ten billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-one".