2010012122221 has 4 divisors (see below), whose sum is σ = 2029913232444. Its totient is φ = 1990111012000.

The previous prime is 2010012122203. The next prime is 2010012122231. The reversal of 2010012122221 is 1222212100102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1956470790121 + 53541332100 = 1398739^2 + 231390^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010012122221 - 2¹⁵ = 2010012089453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2010012122195 and 2010012122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010012122231) 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, 9950554960 + ... + 9950555161.

It is an arithmetic number, because the mean of its divisors is an integer number (507478308111).

Almost surely, 2^{2010012122221} is an apocalyptic number.

It is an amenable number.

2010012122221 is a deficient number, since it is larger than the sum of its proper divisors (19901110223).

2010012122221 is a wasteful number, since it uses less digits than its factorization.

2010012122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19901110222.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2010012122221 its reverse (1222212100102), we get a palindrome (3232224222323).

The spelling of 2010012122221 in words is "two trillion, ten billion, twelve million, one hundred twenty-two thousand, two hundred twenty-one".