202222012000021 has 4 divisors (see below), whose sum is σ = 217777551384652. Its totient is φ = 186666472615392.

The previous prime is 202222012000009. The next prime is 202222012000069. The reversal of 202222012000021 is 120000210222202.

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 24402720687921 + 177819291312100 = 4939911^2 + 13334890^2 .

It is a cyclic number.

It is not a de Polignac number, because 202222012000021 - 2⁷ = 202222011999893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202222011999959 and 202222012000004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202222012000091) 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, 7777769692296 + ... + 7777769692321.

It is an arithmetic number, because the mean of its divisors is an integer number (54444387846163).

Almost surely, 2^{202222012000021} is an apocalyptic number.

It is an amenable number.

202222012000021 is a deficient number, since it is larger than the sum of its proper divisors (15555539384631).

202222012000021 is a wasteful number, since it uses less digits than its factorization.

202222012000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15555539384630.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 202222012000021 its reverse (120000210222202), we get a palindrome (322222222222223).

It can be divided in two parts, 20222201 and 2000021, that added together give a palindrome (22222222).

The spelling of 202222012000021 in words is "two hundred two trillion, two hundred twenty-two billion, twelve million, twenty-one", and thus it is an aban number.