222002120021 has 4 divisors (see below), whose sum is σ = 242184130944. Its totient is φ = 201820109100.

The previous prime is 222002120009. The next prime is 222002120059. The reversal of 222002120021 is 120021200222.

222002120021 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 222002120021 - 2²⁶ = 221935011157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222002119978 and 222002120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222002128021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10091005445 + ... + 10091005466.

It is an arithmetic number, because the mean of its divisors is an integer number (60546032736).

Almost surely, 2^222002120021 is an apocalyptic number.

It is an amenable number.

222002120021 is a deficient number, since it is larger than the sum of its proper divisors (20182010923).

222002120021 is a wasteful number, since it uses less digits than its factorization.

222002120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20182010922.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 222002120021 its reverse (120021200222), we get a palindrome (342023320243).

The spelling of 222002120021 in words is "two hundred twenty-two billion, two million, one hundred twenty thousand, twenty-one".