22231221202 has 4 divisors (see below), whose sum is σ = 33346831806. Its totient is φ = 11115610600.

The previous prime is 22231221179. The next prime is 22231221203. The reversal of 22231221202 is 20212213222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20212213222 = 2 ⋅10106106611.

It can be written as a sum of positive squares in only one way, i.e., 14653344601 + 7577876601 = 121051^2 + 87051^2 .

It is a super-2 number, since 2×22231221202² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22231221202.

It is not an unprimeable number, because it can be changed into a prime (22231221203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5557805299 + ... + 5557805302.

Almost surely, 2^22231221202 is an apocalyptic number.

22231221202 is a deficient number, since it is larger than the sum of its proper divisors (11115610604).

22231221202 is a wasteful number, since it uses less digits than its factorization.

22231221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11115610603.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22231221202 its reverse (20212213222), we get a palindrome (42443434424).

The spelling of 22231221202 in words is "twenty-two billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred two".