10022111221 has 2 divisors, whose sum is σ = 10022111222. Its totient is φ = 10022111220.

The previous prime is 10022111219. The next prime is 10022111233. The reversal of 10022111221 is 12211122001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7137884196 + 2884227025 = 84486^2 + 53705^2 .

It is a cyclic number.

It is not a de Polignac number, because 10022111221 - 2¹ = 10022111219 is a prime.

It is a super-2 number, since 2×10022111221² (a number of 21 digits) contains 22 as substring.

Together with 10022111219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10022111291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5011055610 + 5011055611.

It is an arithmetic number, because the mean of its divisors is an integer number (5011055611).

Almost surely, 2^10022111221 is an apocalyptic number.

It is an amenable number.

10022111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10022111221 is an equidigital number, since it uses as much as digits as its factorization.

10022111221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10022111221 its reverse (12211122001), we get a palindrome (22233233222).

The spelling of 10022111221 in words is "ten billion, twenty-two million, one hundred eleven thousand, two hundred twenty-one".