10202212220021 has 4 divisors (see below), whose sum is σ = 10202224742592. Its totient is φ = 10202199697452.

The previous prime is 10202212220003. The next prime is 10202212220063. The reversal of 10202212220021 is 12002221220201.

It is a happy number.

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 10202212220021 - 2⁶ = 10202212219957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202212220071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4947311 + ... + 6699276.

It is an arithmetic number, because the mean of its divisors is an integer number (2550556185648).

Almost surely, 2^{10202212220021} is an apocalyptic number.

It is an amenable number.

10202212220021 is a deficient number, since it is larger than the sum of its proper divisors (12522571).

10202212220021 is an equidigital number, since it uses as much as digits as its factorization.

10202212220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12522570.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 10202212220021 its reverse (12002221220201), we get a palindrome (22204433440222).

The spelling of 10202212220021 in words is "ten trillion, two hundred two billion, two hundred twelve million, two hundred twenty thousand, twenty-one".