10020011121221 has 4 divisors (see below), whose sum is σ = 10253034635712. Its totient is φ = 9786987606732.

The previous prime is 10020011121209. The next prime is 10020011121223. The reversal of 10020011121221 is 12212111002001.

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 10020011121221 - 2²⁶ = 10019944012357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10020011121196 and 10020011121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020011121223) 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, 116511757181 + ... + 116511757266.

It is an arithmetic number, because the mean of its divisors is an integer number (2563258658928).

Almost surely, 2^{10020011121221} is an apocalyptic number.

It is an amenable number.

10020011121221 is a deficient number, since it is larger than the sum of its proper divisors (233023514491).

10020011121221 is an equidigital number, since it uses as much as digits as its factorization.

10020011121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233023514490.

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

Adding to 10020011121221 its reverse (12212111002001), we get a palindrome (22232122123222).

The spelling of 10020011121221 in words is "ten trillion, twenty billion, eleven million, one hundred twenty-one thousand, two hundred twenty-one".