222021202111021 has 8 divisors (see below), whose sum is σ = 235917860988024. Its totient is φ = 208217497474560.

The previous prime is 222021202110973. The next prime is 222021202111127. The reversal of 222021202111021 is 120111202120222.

It can be written as a sum of positive squares in 4 ways, for example, as 43181799693796 + 178839402417225 = 6571286^2 + 13373085^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222021202111021 - 2¹¹ = 222021202108973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222021202111021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222021202115021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23238555210 + ... + 23238564763.

It is an arithmetic number, because the mean of its divisors is an integer number (29489732623503).

Almost surely, 2^{222021202111021} is an apocalyptic number.

It is an amenable number.

222021202111021 is a deficient number, since it is larger than the sum of its proper divisors (13896658877003).

222021202111021 is a wasteful number, since it uses less digits than its factorization.

222021202111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46477120271.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 222021202111021 its reverse (120111202120222), we get a palindrome (342132404231243).

The spelling of 222021202111021 in words is "two hundred twenty-two trillion, twenty-one billion, two hundred two million, one hundred eleven thousand, twenty-one".