10031031222221 has 2 divisors, whose sum is σ = 10031031222222. Its totient is φ = 10031031222220.

The previous prime is 10031031222203. The next prime is 10031031222257. The reversal of 10031031222221 is 12222213013001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6237830929225 + 3793200292996 = 2497565^2 + 1947614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10031031222221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10031031222193 and 10031031222202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10031031222271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5015515611110 + 5015515611111.

It is an arithmetic number, because the mean of its divisors is an integer number (5015515611111).

Almost surely, 2^{10031031222221} is an apocalyptic number.

It is an amenable number.

10031031222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10031031222221 is an equidigital number, since it uses as much as digits as its factorization.

10031031222221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 10031031222221 its reverse (12222213013001), we get a palindrome (22253244235222).

The spelling of 10031031222221 in words is "ten trillion, thirty-one billion, thirty-one million, two hundred twenty-two thousand, two hundred twenty-one".