101222222221 has 2 divisors, whose sum is σ = 101222222222. Its totient is φ = 101222222220.

The previous prime is 101222222203. The next prime is 101222222291. The reversal of 101222222221 is 122222222101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75548569321 + 25673652900 = 274861^2 + 160230^2 .

It is a cyclic number.

It is not a de Polignac number, because 101222222221 - 2⁷ = 101222222093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101222222291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50611111110 + 50611111111.

It is an arithmetic number, because the mean of its divisors is an integer number (50611111111).

Almost surely, 2^101222222221 is an apocalyptic number.

It is an amenable number.

101222222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

101222222221 is an equidigital number, since it uses as much as digits as its factorization.

101222222221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 101222222221 its reverse (122222222101), we get a palindrome (223444444322).

The spelling of 101222222221 in words is "one hundred one billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".