2010011121221 has 4 divisors (see below), whose sum is σ = 2011007658252. Its totient is φ = 2009014584192.

The previous prime is 2010011121199. The next prime is 2010011121229. The reversal of 2010011121221 is 1221211100102.

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 1742268002500 + 267743118721 = 1319950^2 + 517439^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010011121221 - 2¹⁰ = 2010011120197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2010011121196 and 2010011121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010011121229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498265490 + ... + 498269523.

It is an arithmetic number, because the mean of its divisors is an integer number (502751914563).

Almost surely, 2^{2010011121221} is an apocalyptic number.

It is an amenable number.

2010011121221 is a deficient number, since it is larger than the sum of its proper divisors (996537031).

2010011121221 is an equidigital number, since it uses as much as digits as its factorization.

2010011121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996537030.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2010011121221 its reverse (1221211100102), we get a palindrome (3231222221323).

The spelling of 2010011121221 in words is "two trillion, ten billion, eleven million, one hundred twenty-one thousand, two hundred twenty-one".