222201000212021 has 4 divisors (see below), whose sum is σ = 222203036228844. Its totient is φ = 222198964195200.

The previous prime is 222201000211991. The next prime is 222201000212153. The reversal of 222201000212021 is 120212000102222.

It is a happy number.

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 107203472995921 + 114997527216100 = 10353911^2 + 10723690^2 .

It is a cyclic number.

It is not a de Polignac number, because 222201000212021 - 2¹⁴ = 222201000195637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222201000212621) 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, 1017844700 + ... + 1018062981.

It is an arithmetic number, because the mean of its divisors is an integer number (55550759057211).

Almost surely, 2^{222201000212021} is an apocalyptic number.

It is an amenable number.

222201000212021 is a deficient number, since it is larger than the sum of its proper divisors (2036016823).

222201000212021 is a wasteful number, since it uses less digits than its factorization.

222201000212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036016822.

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

Adding to 222201000212021 its reverse (120212000102222), we get a palindrome (342413000314243).

The spelling of 222201000212021 in words is "two hundred twenty-two trillion, two hundred one billion, two hundred twelve thousand, twenty-one".