222231211421 has 4 divisors (see below), whose sum is σ = 222241292412. Its totient is φ = 222221130432.

The previous prime is 222231211403. The next prime is 222231211453. The reversal of 222231211421 is 124112132222.

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 133671403321 + 88559808100 = 365611^2 + 297590^2 .

It is a cyclic number.

It is not a de Polignac number, because 222231211421 - 2⁶ = 222231211357 is a prime.

It is a super-2 number, since 2×222231211421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222231211471) 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, 5007356 + ... + 5051541.

It is an arithmetic number, because the mean of its divisors is an integer number (55560323103).

Almost surely, 2^222231211421 is an apocalyptic number.

It is an amenable number.

222231211421 is a deficient number, since it is larger than the sum of its proper divisors (10080991).

222231211421 is a wasteful number, since it uses less digits than its factorization.

222231211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10080990.

The product of its digits is 768, while the sum is 23.

Adding to 222231211421 its reverse (124112132222), we get a palindrome (346343343643).

The spelling of 222231211421 in words is "two hundred twenty-two billion, two hundred thirty-one million, two hundred eleven thousand, four hundred twenty-one".